Based on your comments above, I'd expect you to be shocked by the number of porn stars who openly mention that they escort on public media sites like Facebook and Twitter...   I've even found agencies and "regular" escorts posting about availability on those sites.

In reality, while "escorting" is synonymous with "prostitution", it's a lot harder than you might think to catch and prosecute someone.  And many of the agencies and escorts assume (in some cases possibly rightly so) that they are not worth going after, that police have better things to do with their time to go after them.  It's also not economically feasible - it takes many hours of police work, by multiple police personnel (at a cost of thousands of dollars) to arrest someone who, in all likelihood, will get off with a small fine ($200 or less).  It's just not worth the time and effort to spend thousands of dollars to get a couple of hundred in fines.

Often, the only time the police go after someone is (a) when it would be a high profile bust; (b) when they expect to shut down a "sex trafficking ring"; (c) when drugs are involved and they think they can shut down a dealer; or (d) when someone complains.  

So in conclusion, is "escorting" illegal?  Yes.  Do people talk about it openly?  Yes.  Is it likely that anything bad will happen from talking about it openly?  Probably not.