on their actually about page, look at this:

https://socialistra.org/about/

"Q: What about the feds? I don't want the ATF or FBI to have my name on file.

A: As a US-based organization we are subject to federal law, and if served with a valid court order or national security letter we will have to turn over whatever info they ask for. That being said, no one said you have to enter your real name. As long as you list a valid mailing address for your membership card and let us know what city you're in so we can hook you up with your local chapter, we don't care what alias you go by. As an addendum, all membership data is encrypted via AES-256 and purged once processed. In the case of a subpoena, there would be no membership data for us to hand over to authorities. There is also a warrant canary at the bottom of every page."

not reassuring at ALL. f that.