I use Facebook quite a bit for a couple of reasons.
One to connect with friends, family and long out of touch classmates. Generally, for those that don't use it, every time someone posts a status update or uploads a photo, all your "friends" is Facebook get to see it. This often extends to friends of friends, but that deeper than I intend to go with this reply.
You can set up your account in such a fashion so that "friends of friends" cannot see the posts that you make. Security on facebook is probably 210% better than when I first started using it in this aspect. Again - you do have to INTENTIONALLY take the steps to do so.
The other reason is, I was able to set up a separate "fan" page for my woodworking/penturning in order to post separate updates and relevant topics to that page. People can "like" that page to see updates or not as they see fit. It's been a nice simple way for free advertisement, and provides links to the sites where I sell my pens.
This is a GREAT part of FB. Being able to keep this separate from the page you use to chat with your sister, uncle, long lost best friend from junior high etc means that people are more likely to actually take a look at it. LOL
So it's not a bad thing, and everything's free. I tied my account to a little-used Hotmail account, so I don't get any email spam coming from Facebook as well.
There is actually paid advertising available if you are so inclined. Love the idea of using a different email address - but how does that affect your business site?
What I DON'T do is waste my time playing games on it. And in order to see the real updates of my friends and such that I want to see, I use an option to block every game update or invitation that comes my way. So in the end I just spend a short amount of time checking on friends updates every day, maybe posting something for myself, then I jump over here to I.A.P. forums to see what's going on! :biggrin: