I'm pretty critical of the system but it's been this way for years now, and the only new GM commentary is weird edge cases.

But the long story short, you can kick for nearly any reason that isn't specifically a "grief tactic" or harassment (not even limited to "differing playstyles"). And it's really difficult to prove a violation of the latter as they have to pretty much self incriminate.

But, yes. If you're worried someone else might initiate a kick, you're encouraged to initiate first. As removing someone's voting ability guarantees you success if you have a friend with you, but the same applies to them if they start the vote first.

(In general, voting right before last boss is pretty scummy/griefy, but so it goes).