heres a interesting idea how not to get vote kicked
1) do your job in heroics... aka if your a healer try healing people ? its exactly rocket science ... if your a dps try pull more the the tank cuz if u dont it just makes u look like a noob
2) dont be a retard and ask people if u wanna do something ... personally i always find just taking 12 seconds to type something and ask the group goes a long way for looting, skinning, mining etc... it not exactly hard to ask " hey anyone else here mine?" ud be suprised it goes a long way