Personally I won't give an escort who doesn't allow reviews a second look.
If the girl has unverified pictures and zero reviews- I'd still take a chance on her before risking it on a girl who absolutely forbids reviews.
Okay, so anyone with nothing better to do can give you a bad review... but if you make an effort and can prove that the review is a fake (or even make an effort to contest the remarks) then it shows that you take pride in your job... and thats 10 times better then not allowing reviews at all!