I see vote kick abuse happen in Frontlines so much, and it really irritates me.
If a player is not stuck like glue to their group and goes to assist another group (A melee from A or C goes to mid to LB node, a healer goes to help a group that is missing healers, etc) these people usually get votekicked right before the round ends (EVEN IF WE ARE WINNING!)
I /always/ vote no to these kicks, unless the player is clearly AFK or not playing at all. I really feel like a person separating from a group for a time to assist another that needs help, especially while our team is winning, is not means to be kicked.

I have not been kicked as of this thus far, but I see this happen to someone else in about every 1 out of 3 matches. It is extremely abusive since the teams usually kick in the last few minutes of the game.