I agree with the "discrimination out of frustration"... for me, the presence or lack of a photo used to indicate a level of seriousness on the guest's part that I would take into account when accepting the booking. If a guest with no photo had multiple verifications and wrote me a proper message, I would usually accept. If no other info was provided, but they did have a picture, that made me MORE likely to accept.
Now I get booking requests from guests with no photos, 0-1 verifications, no reviews, no profile info, no month in which they joined, and little to no message accompanying their booking request. While I'm sure some of these requests are legitimate and from kind and respectful people, I tend not to accept.
I then get messages from Airbnb telling me my booking is in danger of being deactivated because my response rate is too low.
Why do I owe a response to someone who has not taken the time to provide ANY information to me? This is my home. I wish, particularly with the removal of the photo, that we could require verifications and additional information to go on.
My only requirement in staying with me is respect: not skin color, age, gender, etc. Guests are allowed to be careless with their profiles and requests and hosts are held to ridiculous standards.