I haven't, that's for sure. I have a Facebook page because I thought someone might ask if I had one (and that I should have one in case they did); and I have a Google+ page because Google was pushing the "authorship thing" several months ago; and when I filled out a profile I automatically ended up having a Google+ page that I didn't know what to do with.
Every once in awhile I'll go to one of those pages and "keep trying", as far as trying to think up something to do on them/with them goes. I get to the page, see a bunch of stuff I'm not interested in, and get aggravated. So, I'll delete all the stuff that I had didn't put on there, feel aggravated, and think, "So what do I do now?"
As a result, in order to keep from getting too aggravated with stuff that I didn't put on my own page, I've set my pages to (essentially) "almost as private as possible" and "No, don't let anyone else put anything on my page." (lol) How "sociable of me, right?" :/ Sometimes I deactivate the Facebook page. Then I'll have some reason to go back and activate it again. I don't deactive the Google+ page because I write and there's that "authorship element" with that one. So instead, every couple of months I'll go put a "happy latest holiday" message, or else a message like, "I still don't do much on this page." (It's only a matter of time before I realize that I don't belong on the "public" and/or social side of the Internet and close up shop completely.)