If we are talking about here on KinkTalk, then there are rules about photos.
Encouraged, sure, but optional.
If you are going to post on your here, you are more then welcome too, there are just a few rules that need to be followed.
There is this things about your face being shown on here, you first must go through the Verification Process thread and follow the intructions in order to be Verified.
Last time I checked, there was this thing about Blackmail and sharing photos of others. Blackmail is, (last time I check, may of changed by now), not allowed, because there were problems with it in the past, at least here on the site it is not allowed.
As far as sharing photos of others, weither you are letting someone share your photos here or you are sharing of someone else, first, it must be known that permission was given by a user here on KinkTalk and if the user who is being shared, you or someone you are sharing requests the removal of them, that must be respected
I am sure there are other rules about photo here, but, I do not know them off the top of my head, there are Moderators you could ask directly if there are any other things you would like to know.