Sadly, "Vote Kick abuse" doesn't quite exist. SE claims it does, but in truth, there's barely anything that would fit their strange definition of what consists abuse.

You also can't rely on random people to be reasonable about vote kicking. I've often seen people behaving like the worst scum on the earth not getting kicked, while others get kicked for the tiniest reasons. It's basically part of the game's already rampant RNG. If you want to avoid vote kick frustrations, try to sign up with half a group - 2 people for 4 mans, 4 people for 8 mans, then you have the power to kick whoever you want, and nobody else can kick anyone without your group's consent.
To clarify, I'm suggesting this ONLY to help you avoid abuse in the future, NOT to enable you to abuse the system yourself. You only need 50% to kick someone, no more, no less.

In 4 man dungeons, 2 people can kick either of the other 2. So when there's a disagrement between 2 groups of 2 people each, whoever kicks first, wins. Don't let jerks push you around, but don't be a jerk yourself.