Ban kicked players from instance for the remainder of said instance.

[themadnun]

And is the current situation so much better? You have people demanding vote kick if they are not in the dungeon they want otherwise they will do everything to make you do so.
Vote kick should give the same or more amount of "not allowed to join" time then just leaving a dungeon. What is the point of a punishment (which it should be used as) if its actually a reward for being a prick.

And i bet more people will use it for good use rather then for harrsement (which can be reported)

I'm not suggesting a punishment - simply that you can't end up back in the same party as the people who kicked you from (their particular instance), so you can requeue with in-progress freely without worrying about getting in with the people who kicked you again.

Votekick can and is abused, so sticking a penalty time would sometimes be punishing a victim.