http://forum.melee.org/announcements/official-server-rules/
No intentional teamwounding/teamkilling during a round (teamkilling friends after a round ends is allowed, teamkilling random people is not)
Straight from the rules.
Wow that's totally news to me... I remember like 6 months ago someone kept killing me after round end like 2 or 3 times in a row and an admin was on and he kept saying in purple chat "TK's after round is over isn't against the rules!" when I complained about it. I always thought it was ok to TK after round end after that.
Wish I could remember which admin it was, it was so long ago.
Welp, Learn something new every day.
24 hour ban does seem kind of harsh. Guy on duel server was killing my siege equipment I was trying to build, and nobody would even give him a 1 hour ban despite pics of me requesting him to stop, and pics of him continuing to kill it until it was dead (they said he was "new" so didn't deserve a ban). I don't see how killing someone after round end is a worse grief than killing siege equipment on duel servers (it takes a lot of time and C-materials to build siege equipment like catapult). This Donkey guy looks kind of new also judging by post count, but who really knows.