I need plugin which will detect group of people larger then i set in config. I mean people playing together for example more then 4 would get warning, then if team up again get kick and if team up again they all get ban. Of course I would like to see in data file who got banned etc.
There are similar plugins out there but do not offer kick or ban function. Of course there will be more people together online for example raid or pvp but plugin would need detect who is allies etc. I just do not want people to zerg. Money waiting for right plugin.

As far as I know (my knowledge is far from absolute tho) - there is no 100% way to check if players are teaming (there will be false positives), so it would always be better just to let moderator check this. All I can imagine right now - write code to check if players are in straight visibility for long enough and deal no damage to each other, but it will be pretty resource consuming for your server machine (Plugin would need to do many raycasts in players' fov)