I doubt a single person is reading this right now that could honestly say they do not know what Facebook is, what Twitter is or any of the 100 million social networks and I am pretty sure most people that use social networks have that one friend that is always posting pictures about everything they are doing and so fore.
I imagine you are debating with yourself right now why this is a problem and it isn’t in a way – if you don’t want to see people posting pictures about something then you can just unfollow them but its more to do with people who are simply maintaining an online image so that they can make their lives looks perfect … which to them they see as long as they are getting a ton of likes it is.