FB serves its purpose, definitely different from Fluther. There’ve been some issues with it the past few days because of at least a perception that the user terms allow FB unlimited access to your photos and compositions or anything else you share.
But generally it does what it is supposed to do: let you keep in touch with people you know. (And people you don’t know, if you let it). And it’s usually not intrusive in doing that.
It also has the additional benefit of letting young’uns see Grisson go ballistic when told he shouldn’t be on it.