Board Thread:General Discussion/@comment-26429063-20150729085549/@comment-1038387-20150729091811

Admins can block for whatever reason they see fit, even silly ones. (Though not ones that break the Terms of Use).

If you disagree with a block, the only thing you can do is talk to the admin here on Community Central and hope they reconsider. A few points to take into account:
 * They don't have to do anything - they don't have to unblock you and they don't even have to reply to you.
 * Take a look at your own actions again. Humans tend to be subconsciously biased in their own favor, is this really everything that happened?
 * When talking to the admin, be as friendly and non-confrontational as you can be - don't attack the admin. It's your only shot, and they say no, it stays no.

See User blog:Sannse/How to Get Unblocked for more tips.