Banned for greifing someone, wasn't greifing, not sure if its an auto thing you guys have so if someone just over reacted.
I have no idea what I did to get banned the only thing I can come up with was when I was traveling across the land I came upon some melons, no fence, no signs, just melons sitting there. I tried to harvest one, said it belonged to someone else so I moved on, a minute or two later I get banned.