I remember there was this lady working out of Langley who wanted guys to send their photos. Not sure how many guys did send theirs. I never did, I never would. Having said that, out of about 12 dozen sessions, I have NEVER been asked for one either.
Seeing it from SP's side, it could just be a safety thing.
But If an SP going to screen people on bases of their looks, age and/or ethnicity (many ladies, for personal reasons or otherwise, still do that though), then I really think it's their choice and I am sure they are ok with taking the financial hit. We, as clients have the option of not seeing them. That's the nature of the business, I guess.