I know most escorts check their reviews often. If you are an escort and you see a review for an appointment which didn't happen then you need to do contact the reviews mods as soon as possible, even if the review is positive. It's not just a question of honesty, but also basic common sense. If the review is ratted later then you will be much better off if you can show that you questioned the review before anyone else did.
I know there are escorts who do this. I don't know how many, but all of them should.