On my honeymoon (25 years ago this Monday), we were in Las Vegas taking video from public sidewalk.

Security guard from Slots-of-Fun comes over and makes me shut my camera off and tells me not to take anymore pictures of the gaming area. Here you can see him come up and say "excuse me"...

http://youtu.be/aRNLIze5MeE

other videos:
Stardust: http://www.youtube.com/watch?v=J0saM9C1SZY
Frontier: http://www.youtube.com/watch?v=Rn3lkE-iEn0
Vegas World: http://www.youtube.com/watch?v=3JI2049UYfU
El Rancho: http://www.youtube.com/watch?v=Q-BgRyJVFXE
Rivera: http://www.youtube.com/watch?v=_D52Rs68eco