This is a lovely analogy, akin to "sharing mix tapes" vs "sharing MP3s on Napster". I fear the coming world with extensive public camera surveilance and facial recognition! (For any other "tin foil hatters" out there, cue the trailer for Minority Report.)
You can rest assured that this is already the case if your picture was ever posted online. There are dozens of such products that law enforcement buys subscriptions to.
