I've dropped so many groups because of bad players. I use to try and kick them but to many people just want to finish it instead of replacing bad players. People shouldn't do group things if your not going to work as a group. I never run into any problems doing 4m quest like I do doing HM with group finder. Forcing me to deal with stupid people just to get my BH com is wrong.
This is one of the reasons I like to play tank or healer. When it's time to vote kick the message is, "You can kick the bad DPS or lose the good (Healer|Tank). Choose wisely."
For some reason, it always seems to work.