I've been asked to jumped through hoops twice.
The first time was with NathalieVip, who I've reviewed. She did the whole 'where are you?' 'ok walk here' 'now walk here' etc over the phone. I jumped through the hoops and went ahead with the booking and had an incredibly poor punt. This was in a very busy public place, so I felt quite safe, but was aware that I would look a bit shifty to anyone watching.
The second time was with an indian girl who was touring the area. I arrived at the postcode and it was in a very run-down chavvy part of Birmingham. I parked around the corner and let her know I'd arrived, but she wouldn't give me her location until she could see me, and my car, parked in a very specific spot that she could see. This time I drove off.