I don't understand who wouldn't want to throw multiple shots. If nobody's waiting behind you and no one in your group is on a schedule, then why wouldn't you want to throw 2 or 3 shots?
Want to? Yes, of course. But I want to practice good etiquette more.
I don't think there's anything that would make what skurf said poor etiquette, he was very specific about not making anybody wait behind you, and making sure your group doesn't care.