I've seen tons of PvP abuse now and I'm completely sick of it.
Currently, there is no way to prevent the following:
- member of your team moving in the way of your bomb, after you plant that bomb, and sitting next to it, waiting for it to explode (for those who don't know: team kill or suicide gives a score to opposite team).
- member of your team constantly hunting you down trying to kill you instead of trying to defeat competition. Once is fine, 5 times in a row asks for a psychiatrist visit.
- afk members of same team, which leads to enemy team easily winning (afk kills score points). Alternative fix: give no points for defeating afk players.
My suggestion is simple: a button (F3?) allowing me to select person (1 at a time) I want removed from my team. If 3 of 4 or 2 of 3 team members select same person, that person is removed from the match. Sometimes it would make it easier for the team with less players to win - same as winning without "extra baggage" in a fight versus Jelly King.

My second suggestion is banning these players from random team PvP mode after a certain amount of kicks or reports (needs an option "pulling team down in team-based PvP").

Alternative to kicking would be limiting random team pvp for players with small rating (below 1000) so that newbies don't walk into danger zone by mistake.