I feel its easier said than done. I've been duped a few times and twice by the same girl. First time it obviously wasn't the same girl in the photo but I carried on as I was still quite new at the game. Tried a different profile on the next occassion and it was the same frickin girl! I was lead down this really long hallway by her housemate, only to be greeted by a "Hello again!" I had both of them in the room asking how long I wanted to stay etc..
Though another time I discovered AW and went to see a "Verified member" and instead some old woman appeared who honestly looked like my mum. This time I wasn't having it so I made my way to the front door only for her to then proposition me with an additional girl for only £20 extra. It turned out to be the actual girl i wanted to see, who had freaked out a bit because she thought she recognised me.
So that ended up being an awesome bargain threesome. I just tried not to look at the older one. It was still good though.