That must have been HRE server, so wrong section first of all
So if you want to have a quick answer you could open a thread in the "Other" section, otherwise wait and a moderator will probably move it once its spotted.
Then, look a bit further up on that screenshot, Poin has been teamhitting afks
It doesnt matter whether someone is leeching, afk, guarding the virgin, or actively playing, intentional teamhitting is not allowed (accidental teamhits happen, but poins were intentional)
So I guess thats the reason for the ban, but an admin will be able to tell you for sure