You stated earlier, players are driving many miles to vulture a game.
Vegas is different in that you have many Casinos nearby as you already know.
Vegas has crazy competition for Vision Plays.
When Visions first started I used to see fist fights break out.
The way I understand it in Vegas is that you can basically stand directly behind a person playing.
I suppose they could try to get you to move but I am not sure how many inches or feet by law.