If people aren't getting value from a meeting, they should stop doing it. Or reflect on why they were doing it in the first place. Talk about it at retrospective! Or sooner! You do have those, right? :-)

I once quit a job and when my boss asked why I was quitting it was the lack of retrospectives. The following week we had a retrospective, and I stuck around for a while longer.

That's how much I believe in it.

Of course, that company went from upstart to dominating its market in 5 years. Who knows if the fact that the whole company started constantly tuning its process helped? I'd like to think it did..