But this isn't about what bothers you on the plane, it's about being chucked off, so I don't see a point about bringing up your pet peeves about how people should act on a plane. Just because this nuisance is new to you, doesn't mean it's any worse than someone reclining on you from the front.
Yes, a drunk person can be taken off the plane because drinking can lead to violence, and there's precedent to that. Doing a countdown that has negative consequences has no precedent.
But that's the thing. This guy's being intentionally provocative. That's the point of a prank, after all, to provoke people. And the thing is, airlines? They don't want to or have to put up with that shit. You're not even supposed to make jokes with TSA agents ffs.