Yeah, I'd say no too because of the whole privacy thing. I don't have multimedia on my phone either, but it goes the same way vice-versa. There are a lot of "pic-hunters", guys who waste SP's time by asking for a photo so they can prove they are real, and then have a little collection of photos. That is why a lot of ads say that the provider will not send any photos. So if it is not the norm for providers to send verification pics, then the same for clients.
The provider is question needs a better screening method. They can simply ask for age and race and first name, and just search their number though blacklist sites. And if the client tries to lie about their age or race, she can just refuse to see him once initial contact is made.