We'll start here. I am glad I left Facebook when I did. I am certainly no more a fan of it now, than when I chose to completely back out of the Facebook social cyberworld. Most people don't realize that when you shut down your FB account, unless you hand-delete all of your and other people's information, contacts, "likes", photos, comments, etc., Facebook still has control and access to anything you've left behind ... electronic footprints, so to speak. Even with everything I did to eliminate as much of my page as I could, I am still finding trails - sites and things I missed. Any time you "agree" to conditions for any website or hyperlink that requires "membership" or "sign in", the "pages" of "conditions and rules" is where they catch us. Really, how many of you actually "read" what you've "agreed" to, just to satisfy a bit of curiosity? I have, and many times more than I should have, that's for certain. "It's all in the wording" ... and usually not to your benefit. It's never as easy to get out of them as it is to get signed up. Some sites even require WRITTEN request to be removed from their search databases. I've even found websites who request more information than initially given, to be SURE you are, who you are ... gimme a break!
Hmmmm ... I've always been suspect of the excessive control of personal information on all social sites, but moreso with Facebook. I never liked it when they would change things (and still do) with no input or advising of ... changes, for members. It's quite a process to remove yourself - it's not as easy as closing your FB account. I have website links I can share which give you information that FB itself doesn't offer you if you choose to leave.
Bottom line, you have to educate yourself and make your own decision if social websites are you cup of tea or not. Sometimes I wonder if the "rules and regulations" even matter. Most of them state their guidelines and, in the same breath, will state that it is within their "right" to change their rules and regulations - any time they want ... and don't have to give you notice. You have "agreed" to "check back for changes" ... sure lets them "off the hook", doesn't it?