Thing is with FB you either love it or hate it.
It's got something of a tarnished reputation and I've heard of more than one person who's taken an infected PC off to be repaired to find it riddled with viruses after a visit there.
Security settings are another thing that creates problems for a lot of people.
It's great for keeping in touch with close friends and family who might be spread about the globe but as with most online stuff you have to be on your guard.
I opened an account there once as a cat ... and collected hundreds of strange friends, mainly randy tomcats.