I haven't seen it here in the UK yet either. I have a booking request now from someone with a cartoon profile picture. I've written and asked them to upload a picture of themself, and if they don't do it before the request times out I'll have to refuse their request so it doesn't affect my response rate - but then it still affects my rates on accepting bookings, which is a bit annoying. I don't think anyone should be allowed to join without a profile picture of their face - I'm a single female sharing my apartment with guests, so for my own security, I will only accept booking from people who are willing to upload an image. This is a big part of why I won't do Instant Book too.