> Once you start seeing clients, expect to get used as a reference and to start getting emails from other providers asking about clients you’ve seen. It’s considered extremely good form to respond; this is a collective safety system we all use to help each other, you rely on their information and they rely on yours.

I wonder if the police could exploit this practice to make arrests. Arrest an escort, get access to their email as evidence, then start going after the people who made reference requests. I suppose the email address could even be used to fake a reference for a sting, but I doubt that would be legal in the US. Probably the only reason this system works is the police don't care enough to exploit it.