Photo Matching Software

Hello,

I have a question about the existence of a (preferably) free online photo identification program. I ask this because I'm thinking about doing the online dating thing, but I'm afraid a lot of people put fake pictures up – pics they've gleaned from the Internet. Is there anyway that you know of that I can save their profile pic, then paste it into some kind of program that can search the Internet for matches?
That way I can avoid the charlatans ; )

Thanks,
Evin