You completely destroyed a catapult that blackzilla and another guy had been setting up for 20 minutes. You just walked over and destroyed it for no reason. That is griefing, and when it comes to poll kicks people just come back and grief again. A ban was necessary.
This was not an abuse, but rather a use that was exactly what poll bans are for, since an admin is rarely on the duel server. Mute does not stop people such as bootybuster from griefing. 66% Voted 1, it wasn't even close.
I'm certainly not the only one who saw it. You griefed and got punished, be pissed at yourself.