[Sheefeadalfuh]

If unacceptable behavior is tolerated long enough it can become acceptable within the group, which is why you're feeling aggrieved. But you knew it was unacceptable, so you need to realise he has to step it up given the level of visitor.

Is 48 hours too much to ask, probably if you're a bunch of slackers , but are you passing on the chance of practicing with an 8th dan?

You may be right but it's up to you to apologise, but perhaps from this day forward etiquette is followed always then there wouldn't be a problem.