Real life pictures?
If someone wants to post a picture of himself/herself, and that actually bothers you ... then you need to get outside more often.
No one says you have to post a picture.
No one cares if you do or you don't.
If you want to, go ahead.
If you don't want to, no big deal, at all.
People who choose to post a photo could be posting that photo for an infinite number of reasons. It may make people more comfortable to think/say photos are only posted by "attention ***" ... and while that occasionally may be true, it's naive to believe that universally.