Maybe they should rename it something to reflect the situation.
I have an idea, how about "Mandatory Broadcast Zone"?
Seriously, though, I think the "required" broadcasts should be kept to an absolute minimum, and let airmanship dictate the others.
I would suggest 10nm (or 5min, although I can live with 8), downwind with intentions (only if other than full stop), before entering a runway, and when the likelihood of a conflict arises.
Keep it simple and people will comply.
