Take down Facebook....
What a thought! Wouldn't that be something! Haha. As well as the crime implications already mentioned, imagine how many friendships and marriages it would save right there. Yep, I'm sure it has it's part to play in such things. We all must have oveheard the occasional "did you see what she put on Facebook?!" Unfortunately, what used to be said behind closed doors no longer is for some people.
Maybe tell the Ruskies people use it for spying, they will sort it for us haha.
But as you say, people must be aware of the risks yet still do it. My mate who was burgled while he was on holiday is still on there apparently. And I have been to a couple of Police conducted seminars at my son's school warning parents of the risks of social media. But the general feeling among the parents seemed to be "I'll be more careful", rather than "lets stop using it". Unfortunately, people plaster everything they do on there in the mistaken belief that only their "friends" can see it. Yeah, right!
And I do speak from experience. I did have an account several years ago as a way to keep in touch with my two older Son's. I was amazed at how remote some people were from me who's postings I could see. But I had to close it in the end as it drove me fu--ing baserk, not because of Facebook itself, but because of the way it seemed to change otherwise rational, intelligent people into posting utter mindless sh-t!
It seems to promote this mindset in many people for some reason, a sort of kudos seeking thing. It is well documented. Google it and you'll see what I mean. Therefore even if Facebook went, I think something would probably take its place in fulfilling those needs sadly.