Punters having empty profiles on AW is totally normal - don't worry! They don't have to promote themselves or appeal to anyone, so there's no reason for them to fill it in (and when you see some of the ones who did, you'll wish they all left it like that

).
Is your booking an outcall? There isn't any reason to know who a punter is otherwise, and whilst it would be possible for somebody to make a booking so their friend can go along I don't think it happens much (if they're using the booking system I don't think they'd want to risk getting bad feedback, if nothing else).
There are quite a few threads and posts about screening if you do a search
