No intentional teamwounding/teamkilling during a round
No, it isn't against the rules. If someone complains, we will ask the server not to kill them after round. If you were warned to leave someone alone, it falls under griefing and so could result in a kick or ban if it continues.
Personally, I would be up for extending the amount of time between round end and re-spawn another 5 seconds for tomfoolery by the victors in the hopes that it might reduce the amount of grab-assing that goes on just after spawn and just
before the round ends when there is such a lopsided victory that the kids can't contain themselves.
I do wish they would disable points and k/d after round ends though