What about that weird sidewalk area between Imperial Palace & Harrahs? You can't continue walking straight, but must walk around the curve with street vendors and outdoor bar area. Are you technically on "private property"?
I agree that since you can't enter casinos (or rather, you'll probably be kicked out rather quickly) it's pretty pointless. However, it's a great opportunity to meet a LOT of people and educate them. And while it's not my purpose (to educate) most of the time I'm OC, it may be fun to spend a few hours walking around one day happy to talk to anyone who's curious, including LEOs.