What Marou said, except that I recommend using Tor. When you rely on a VPN to keep you anonymous, you're simply trusting their word on not keeping logs, even though many have cooperated with authorities before. The NSA really does seem to have trouble tracking Tor users, or at least they did in 2012.

Next to that, I recommend picking a username that doesn't reveal anything about you. Like mine. My name isn't Larry and I'm not a swinger; it's just random. Don't name yourself after a character from your favourite book either. And don't give up an email address when signing up on this site.

Edit: oh, and one more thing. Saidit often returns 1020 when you use it through Tor (to prevent DDOS attacks), but it's easy enough to press ctrl-shift-L (or cmd-shift-L under macOS) until you have an identity that does get accepted. A bit of a nuisance, but nothing unacceptable in my experience.