Users not having their real face pictures
It should be mandatory that users must have a picture of their face because it’s annoying that users can see how you look but you can’t see how they look.
Not everyone is in the same position as you, where it's possible or safe to put their face up in such a public space..
eg: Such as, living on site where you work for other business owners that if found out, it would be concidered destroying their businesses reputation..
Losing them the job and a place to live..