We all know the guest profile picture can not been seen until reservation is confirmed. But there are some ways for a "work around"..
I found at least 3, which give me opportunity to see in many cases the guest picture before accepting. I am not going to share them all three, as Airbnb will say "thank you" and correct the glitch.
But here is one of them:
Open the guest profile. If the guest has reviews, the guest probably wrote one also. Goto a host profile the guest was reviewed by and look up the guest. If found you see the small picture of the guest ! click right, choose "view image", and you see the normal sized image.
Kind regards,
Emiel