As a point of travel etiquette, I think it would behoove just about everybody to adopt the following checked-luggage protocol:
For the love of Mike, people, stand back from the luggage carousels. (Unless you are disabled in some way, in which case do what you gotta do.)
Stand back. Make a wide ring. If everyone did this, then you would have adequate space for everybody to stand, and adequate visibility to spot your luggage coming down the conveyor.
When you see your luggage, I promise you you will then be able to step forward at your leisure, check the tag, and retrieve your bag without having to fight through a scrum. And then leave.
Crowding the carousel down not actually make the guys in the back load your luggage onto the belt faster. And you cannot actually get your luggage until it is on the belt, did you know that?
Crowding the belt also slows down your ability to get your damn bag, because you can't see it coming. You have literally nothing to lose by being polite and taking three steps back.
Also, do not step in front of other people waiting for their luggage unless you actually see your luggage on the belt. Seriously, it's rude. It's probably even ruder than reclining your chair on non-overnight flights.
If everybody were to work together on this, and adopt it as a standard of behavior applicable to all, it would lower checked luggage irritation by a median of 45%.