No one is forcing you to say anything Roger. You see things from a client perspective and I have one from the provider's side.
You are ASSuming he has no references and wouldn't be screenable. He never stated either in his request. Just because you do things one way and others do things a different way, doesn't mean it's wrong or less safe. You're not booking him so what does it matter to you?
Thankfully, I do not advertise and choose my clients based on when
and if I want to work, not because I have to. That coupled with a super sleuth IT background, yeah good luck for the gent trying to BS his way past my screening.
But hey, continue to enjoy that chip on your shoulder and at least the OP wasn't whining about rates and the girls having GPS.
Cheers!