1. for the enforcer, i double lock the door and move a chair, a dresser, and/or coffee table against the door so they can't bust the door that easily. Add oil slick and marbles on the floor (stolen from the Home Alone movies)

2. I usually wear a bunny costume and keep it on during sex so even if they tape me my face and my body are not shown. if i sense anything funny I wont even have sex with the provider. you can't never be too safe.

3. Also just in case if the provider is really an alien trying to get my DNA or make a half alien half human baby, I splash a glass of water on her before sex to test her "alien-ness". I learned this from Signs

If you're that paranoid about seeing providers, the safest route is to see a provider at a brothel.  Legal, safe sex, discreet, see whoever is available when you get there, etc.

The enforcer is used in two situations, where they intend to rip you off, or to keep things under control at a bachelor party.  If a provider has lots of good reviews, chances are they are not going to rip you off (doesn't mean that an enforcer is nearby, just not going to shake you down).

Webcams?  Not sure if it's worth worrying about.  Just think how many surveillance cameras your under anywhere in Vegas.  You really don't have any privacy.  Most people just don't care (unless you're some kind of al qaida terrorist, even then, I think they went unnoticed).

Generally, you will have better options with outcall appointments as most indies are outcall only.  If you need to, get a second room either in your hotel or a nearby one.

Bob