I was banned from a phone chat site. During my gap year I got really bored and decided to troll and cause fights with everybody.
It was the first time I had ever been on any sort of chat website. My friend introduced me to it. However I did make a friend on there who I have been friends with since then.
At least I can see we're not the only ones who banned him. If I'm not mistaken he said somewhere he was banned from an anime forum as well.
EDIT: Screw this. No reason we should sugercoat things. Our members preferred BBLounge over mybb. I chose to leave mybb on my own but some post on both. In fact the only one to ban someone for posting on another forum was Rudolph. So this outcast thing only exists in people's minds. It's just a forum that Rudolph is afraid of.