Was there no one around to challenge B&B about these things?
They were the showrunners so they were in charge. They also had tradition on their sides because in television (American T.V.) the showrunner usually writes the season openers and closers, and series finale.
But I'm sure some on the staff (not just the actors) objected to the episode. Most certainly the staffer who gave Quills the advance word on the episode. Quills never revealed his source, but I still think it was one of the writers.