What purpose it serves is in how you use it, same as the internet in general.
I use Facebook as a tool to get my art/music out and build up my fan base, as well as using some other sites. I keep up with fellow musicians, artists, cannabis activists, scientists, atheists and more. Having performed on cruise ships for 20 years, it is the easiest way for me to keep in contact with some of the many thousands of people I've met from around the world. As well as family and friends from school and elswhere.
I've never played a game like Farmville, Mafia Wars or any of those time wasters. I actually block each game request as I get them- so get less and less requests.
I use it to read and post links to things I find important- be it atheism/religion, failed cannabis/drug war policy, politics, music, art or whatever. I don't get many religious posts on my FB (and I have over 2,500 "friends"-80% I actually know), and those are not directed at me.
If someone doesn't like something I say or post and if I lose a "friend" on FB from it- I wouldn't even know who "unfriended" me unless they told me. The number of friends moves a few up or down every day - loose one- gain two- but it doesn't show who is no longer a "friend".
If you're bored of it, OK, don't use it, or check it infrequently, or inactivate your account- but getting pictures and all the rest of your stuff off of FB is harder than just inactivating your account.
See my illusion-filled sm'ART on Facebook or at http://www.kelinsmart.com
I keep my FB account mostly because people keep asking me, "Do you have a facebook page?"
Of course, the fact that I am an atheist is near the top of my info page. So far, no one has "unfriended" me (what a stupid term). I read the crazy shit they say and use it to inform my replies and blogs on my Nexus page.
I guess I hope some of them will "unfriend" me so I can see who my loyal friends are. Is that vain?
I don't like facebook and I don't use it. Same for Linkedin.
On facebook I actually do have a registration, but it is just an allias on an email address used for nothing else. So no one can find me. I don't use that registration either. Its just because some people use facebook and they want me to find them.
The open net is better. Better people make their own home pages and all on the open net.
Myspace I don't mind, but not currently using.
Problem with facebook and linkedin is that they want a particular style of profile and presentation.
I believe in anyonimity. So best just to use a Guy Fawkes mask.
I have actually gotten laid about 7 times because of FaceBook lol. Other than that yeah, just a time filler.
I have a facebook account and go on twice a week. Mostly its a waste of time. Keep tabs on siblings otherwise its boring.
I left Facebook because they have unlimited rights to commercially exploit every word and image you post. Post a picture of your kid? You could find that image selling stuff or promoting religious claptrap.
I quit facebook because of the privacy issues. It was nice having a way to connect with s handful of friends, close and far. But the idea of facebook tracking me even when not signed on creeped me out. I don't know if they actually did that, but talk of same was the last straw. In addition, facebook kept trying to get me to friend people who I had no idea who they were, or why. Having friends who don't know each other, and have nothing in common except through me, friend each other, is also kind of creepy. In fact, the program was nagging me to friend strangers. I miss being able to update with those few friends. I value my privacy. Giving "big brother" even more access to my life was too much. To hell with facebook.
My family and friends are spread pretty much around the country and world so its nice to see the latest photos and see what they are doing I love it.