Data Privacy Day

Every year on January 28, we celebrate the international event of Data Privacy Day. The purpose of Data Privacy Day is to raise awareness and promote privacy and data protection best practices.

Privacy is a human right. Many people confuse privacy with secrecy and anonymity. While privacy is a human right, anonymity is a choice. Anonymity is one of choices made possible with privacy.

I’m very careful about my privacy and I take it very seriously while I’m not an anonymous person. I don’t have anything to hide, except for my personal data, but I’m still very cautious about privacy. Privacy is like free speech. I respect my right even if I have nothing to say, or hide.

As Data Privacy Day is about raising awareness about best practices of it, I decided to write a note about one of the ways I keep my personal files secure through encryption.

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My experience with Matrix

I’m a fan of decentralized networks. I use Mastodon instead of Twitter, I use Pixelfed instead of Instagram, and I use IRC and XMPP instead of Whatsapp. I’m very well satisfied with my experience. I don’t feel lack of any social network or messaging system.

I respect myself, therefore I don’t use proprietary apps and networks. If someone needs to contact me or have a digital social relationship with me, then that person can start a respectful relationship by using free software and privacy-minded networks.

However, I should mention that not all of Fediverse or decentralized services/products are good. For example, some programs/networks don’t have a good user experience.

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May students be disciplined for what they say on social media?

A Pennsylvania school district has asked the Supreme Court to rule on whether students may be disciplined for what they say on social media, New York Times has reported.

The Supreme Court next month will consider whether to hear the case of Mahanoy Area School District v. B.L., involving a student’s freedom of speech while off school grounds.

It was a Saturday in the spring of 2017, and a ninth-grade student in Pennsylvania was having a bad day. She had just learned that she had failed to make the varsity cheerleading squad and would remain on junior varsity.

The student expressed her frustration on social media, sending a message on Snapchat to about 250 friends. The message included an image of the student and a friend with their middle fingers raised, along with text expressing a similar sentiment. Using a curse word four times, the student expressed her dissatisfaction with “school,” “softball,” “cheer” and “everything.”

Though Snapchat messages are ephemeral by design, another student took a screenshot of this one and showed it to her mother, a coach. The school suspended the student from cheerleading for a year, saying the punishment was needed to “avoid chaos” and maintain a “teamlike environment.”

The student sued the school district, winning a sweeping victory in the United States Court of Appeals for the Third Circuit, in Philadelphia. The court said the First Amendment did not allow public schools to punish students for speech outside school grounds.

I think that is right. Students shouldn’t be influenced by school rules, outside of school. I remember few years ago a student was suspended because he had a confederate flag on his car and many black students complained about it.

I supported that suspension as schools should have rules to protect other students, such as being physically and mentally abused. However, in this case, this is happening outside of school and she should be free to express her opinions whether school officials like it or not, without fear of anything happening to her.

I understand that her post (on Snapchat) was about a matter happened in school but the post wasn’t breaking any law or harming any student. If she threatened any student or coach (or official), then it would be OK to take action against her but we can’t see such thing so far.

I believe students, and other people related to school should be able to freely express their opinions or emotions about any matter whether in school or not without fear of anything happening to them, as long as they don’t harm anyone.

Social networks I don’t use

There are some social networks I use and there are some I don’t use, for reasons. Some social networks are very good core but they don’t suit the standards I believe an online social networking service should have.

For example, I believe Twitter has a brilliant idea behind it but I don’t use it, because there are more factors than the idea behind the network that matters when we are considering joining a social network.

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Celebrate Newtonmas (Grav-mass) with us

December 25 is the birthday of Isaac Newton. On this day, we celebrate the existence of comprehensible physical laws and we call it Newtonmas or Grav-mass. (2025-12-25 Update: I was today years old when I found out that Newton’s birthday is on December 25 Julius calendar; on current Gregorian calendar his birthday is on January 4th.)

The name Newtonmas can be attributed to The Skeptics Society, which needed an alternative name for its Christmas party.

Celebrants send cards with “Reason’s Greetings!” printed inside, and exchange boxes of apples and science-related items as gifts. The celebration may have had its origin in a meeting of the Newton Association at Christmas 1890 to talk, distribute gifts, and share laughter and good cheer.

One other way to celebrate Grav-mass is to decorate a tree with apples and other fruits. Glue them or attach them, but not too well! The idea is that occasionally a fruit should fall.

Another way to celebrate Grav-mass, in a group, is by telling each other about scientific knowledge and understanding, or discussing what kind of experiment could answer an unresolved question about the world.

Science-themed Grav-mass (Newtonmass) celebration poster with dark blue night background. White text at top reads ‘Celebrate Grav-mass Dec 25.’ A stylized green Christmas tree is decorated with red apples and orange ornaments representing masses. To the right, Newton’s law of universal gravitation is shown as ‘G m₁ m₂ / r²’ with vertical arrows indicating distance r. A star-like symbol appears near the top right. The tree stands on green ground with a brown trunk, blending physics concepts with a holiday Christmas tree illustration.

Newtonmass can be celebrated by anybody who loves science and wants to have a reason for a celebration. It’s not exclusive to any specific group or belief.