If you walk into a sting you are screwed regardless of what you do, but take precautions anyways so that they will hopefully have no choice but to let you walk out of there without a summons. Do this by never discussing money with the girl and never pulling out any money until the session is over. In my experience it is rare that a girl will actually ask for money up front. If there is no discussion about money they really have no evidence of illegal activity. I once walked out on a provider b/c when I got there, she asked if I wanted GFE or non-GFE and quoted the prices. That was just too weird for me and my big head said something was wrong so I said, I do not know what you are talking about and walked out the door.
All that said, if you walk into a sting, at some point you will be swarmed by the cops b/c no female vice cop will engage in the activities that are in issue just to bust you for solicitation. So, if you are ever approached by a cop, DO NOT ANSWER ANY OF THEIR QUESTIONS BEYOND PROVIDING THEM WITH YOUR NAME AND OTHER BIOGRAPHICAL INFORMATION. Give them your ID and say nothing. If they ask why you are there, stand there with your mouth shut. This will likely result in them either telling you to get out and never come back or them giving you a summons that will not be prosecuted. Remember, these guys have done thousands of interrogations and have heard it all. Whatever story you give them will be worse than no story b/c no story cannot be proven false.
From the girls perspective, there are several mistakes that you make that make you easy bait.
1. do not list any of your services on your web site or even link to your reviews, as it can easily be argued that linking to your reviews constitutes adopting the reviews and is therefore an admission. These warnings that girls have on their web pages that say payment is for time and anything that happens between consenting adults is not for the money is totally useless and may even constitute an admission. I think the average juror would consider that an advertisement that there are further expectations other than just hanging out.
2. Do not discuss money with your clients. Your ad and website should state your rates and you need to have flat rates for time. This makes it difficult to up-charge for certain services like Greek, but when you spell it out on your web page, and then ask what services the client wants, you just gave LE an easy case to prosecute.
3. Never ask to take care of business first with a client at the beginning of your session. No money=no bust. You gals do your screening and can pretty much eliminate the guy who will run without paying you that way. The worst thing that will happen to you if you take this precaution is that you will be cheated out of a fee for one session, which may suck, but not as bad as getting busted. Anyways, I know that if I stiff a girl, she is going to make sure that I find myself on some sort of a black list so that no reputable provider would ever see me, which is probably pretty much what every guy on this site thinks.
4. LE checks are great for the guys, but not for the women. They are great for the guy b/c it pretty much assures us that you are not a cop. No woman cop is going to do that for a low bust. That being said, I still don't want to pay you until the end of the session. But a cop can and will certainly go through the LE check with you and that LE is pretty strong evidence that this service is what will happen for the money. I have even heard of them going through a session with a girl, but I would expect that to be rare since they will likely have a surveillance team with them. Understand that cops are allowed to lie to you. Unless you are looking for help, a cop will never admit to being a cop until he slaps the cuffs on you.
5. If you walk into a sting, at some point you will be swarmed by cops. But follow the advise I gave to the guys above. Utter not a word! If you don't have any details on your ads or web site that show you are going to engage in any sexual acts, don't take any money (the sting will be blown up before your session ends) and do not speak with the cops, there is now way that they do anything worse than give you a summons (If they arrest you, PM me b/c I would live to sue them for violating your civil rights).