Tell me where do these videos and photos come from if not made and submitted by the SP themselves on one form of media platform or another.it's great that you can't fathom why clients would take and exchange photographs and videos without an SPs permission because it probably means you don't engage in these practices yourself. however, it happens, unfortunately.
similarly, it's great that you personally don't care about digging up and exchanging personally identifiable and sensitive information about SPs. but, again, it happens, unfortunately.
to Lena's point about private groups SPs have to discuss clients and whether they exist, they do. there's one that SPs of an agency use where I supposedly have a funny nickname. from what I understand, they're mostly discussing hygiene and matters of safety but they discuss other things too.
Yes I agree that it is not right to spread this without their permission, but you really have to be extremely naive with your head in the sand to think that it will not be and not necessarily by men,