Board Thread:General Discussion/@comment-33364736-20181209174235/@comment-1038387-20181209191335

Admins can block for whatever reason they see fit, including no reason. That does not constitute any abuse of the power. Staff doesn't intervene unless there is a Terms of Use violation or if there is a community concensus against the admin.

See here for more info:
 * User blog:Sannse/How to Get Unblocked
 * User blog:Sannse/How You Can Work Through an Admin Dispute
 * User blog:Sannse/Why Staff Don't Remove Bad Admins

That's just general tips and policy. It might not work on every admin. It probably doesn't help that I didn't bother reading beyond "Family" because I knew exactly who you were talking about.