Quite easy. Police decide to harass a WG. Pose as a punter then use AW to make a booking and get her address. She's on tour in a hotel. No laws broken but police inform hotel who quickly eject her. This has happened in Aberdeen.
Turn it round. Pose as a WG then post a slightly dodgy profile - bruised face - "I'm 18 but look younger." Police interview punter who makes a booking, outside on a busy street, wearing gloves, holding condoms up in plain view found in his pocket. Question him for half an hour till every passer by has had a good look. Then tell him no crime has been committed and le him go.
Punters need to have a zero tolerance on some things. If she's unverified and her age is dubious, say you will ask for proof that she is over 18 before handing over money. And do it! If a profile looks dodgy/possibly trafficked, avoid it!