I just went to a Host2Host conference in Portland,Oregon and had the opportunity to tour the North American headquarters for Airbnb (very nice digs). In order to enter the building we had to sign in on a computer pad and the security guard could see our non-virtual faces, ha!
When I asked about the instant booking by guests with photos of objects instead of them, they said keep writing on this forum and someone who reads these comments may eventually address this issue.
I was disappointed this was not an obvious top priority.
Ask all your airbnb host friends to complain mutlitple times on this commuinty site about this topic. Like writing to your senators, apparently.
Post your concern multiple times. Airbnb is data driven.
Copy and paste your comment to all areas regarding requiring guest to have accurate photo. (They can change it to an object after initially using real photo.) Create new forum topic headers and post there too. Thanks everyone!