I think kicking for watching cutscenes would be really unacceptable. With rare exception, there is no harm to the party if people watch the cutscenes, pretty much all dungeons have a generous time limit.

The cutscenes are more enjoyable and make more sense when viewed in the context of the content they belong to.. I think you lose that when you view them from your inn room.

If you want to hate on people for viewing cutscenes, then form your own party full of people who will skip them.