What is up with the places that actually appear to post addresses on CL? Are they LE or just stupid?

Not that I think the providers on CL are worth much, but how is posting an address there any different than the numerous addresses and maps for AMP locations that are in the Yellow Pages, City Paper, etc.  

LE knows the location of every incall they want to know about.  Thats a fact.  And no, no amount of screening can protect you.