Yes I actually did, but like a few years ago before they updated the appeals. Before you couldn't see your evidence for anything so I kept demanding to view the evidence, but eventually like a year later they no longer had the evidence do to the switch over and I was no longer muted on forums.
Not sure if its still possiable and it took me alot of messages to finally get them to unban me.
Nah, I think if they banned you, you have nothing to do (if you already used the "last chance" appeal).
Otherwise they could get much of that spam lol...