It's all about context. Brunner's goal last night got a pretty emphatic uppercut. But the team was hot at the time, and Brunner had been rumored to be a potential scratch candidate, so I don't blame him for being excited about his 1st playoff goal.
Most of the big "controversial" celebrations never bother me. They show a clip of the goal and what comes after completely out of context. The Yakupov thing is the perfect example - they'll show that three years from now and people will be like "why was he celebrating like that for an early meaningless game on a team that missed the playoffs?" EDM had a goal taken away from them right before that and scored again with like 10 seconds, it was a great moment. Why not live it up.
The only thing you don't do is the Anisimov thing (rifle/bazooka) where it appears directed at the other team.