I tried to use AirBnb once, but apparently you can't book a reservation unless you upload your photo. The fuck? And then they wonder why their hosts discriminate by race! I sure don't need to show my photo to a hotel to book a room.
to be fair, you are not renting a hotel room, you are renting someones home or room (in most cases). I see it as a way to build trust. Is a complicated situation... if a host chooses to discriminate me from staying at their home because of my race/age/sexual orientation I wouldn't really want to stay there anyways. Is it right? absolutely not. Is it against Airbnbs rules? YES. Will they be banned if they are caught? you bet.
It's not about checking in. Obviously I had to provide an ID to every hotel I've checked in (though reportedly Richard Stallman manages to avoid that too). It's about not having to upload a profile photo to be able to use the damn app. It's the only app I've seen (including Facebook itself) that insists on doing that, and it makes zero damn sense.