Those users probably have performed various other actions that reassured FB they had not signed up to spam (joining groups, adding many friends, etc.). It was t

Those users probably have performed various other actions that reassured FB they had not signed up to spam (joining groups, adding many friends, etc.). It was the combination of being a new signup with an emptyish profile and having no clearly identifiable face that led to my account being blocked, with a message that specifically said I would not be able to regain access to my account until I uploaded a photo where my face was fully visible.