There is already player kicking in place for team-killing and idle/afk players. The new vote kick option is being abused by certain players as a joke and it's getting worse as more people realise they can use it.
Sometimes I don't actually know if the kicking is for a valid reason, but today it happened twice in a match where myself and another player, both on top of the scoreboard with capturing objectives and kills, went through to the second-last objective of a hardcore co-op whereupon obnoxiously loud mic spammers decided it would be funny to vote kick the two of us for no reason. The reason given for the vote kick was idle/afk which didn't make sense in either of our cases and lost both of us an almost an hours worth of exp.