It is easier for LE to find those places,i don't think they can go in an hotel room legally rent just to find an Sp unless they have receive an information.
Really? What would stop LE from following the agency ban making drop offs to clients? They note the hotel room and hotel at each drop off. At the end of her shift they slap her with a subpoena and ask her to describe each client. They subpoena the names of each hotel room renter. Of course they will not have anything unless she says she was having sex for money. But guess what. They can intimidate her, as they always do with witnesses, etc.
I suppose they could go into each legally rented hotel room if they suspect a crime is being committed? Before C-36, there was no crime. Now, they made the buying of sex even in a privately rented room a crime. It makes things complicated.