How far do you go with Facebook if it comes to friends?

I used to accept all the people who I know in real life, but also some people from the online world. I've changed my mind though and today, I started removing all people I've never spoken too in real life, they aren't really worth being a 'friend' for just maybe one deal or one messenger chat we had.

So I use Facebook for my offline, real friends only. That's where I find Twitter is easier to connect with everybody -- whatever you know them from, but if it's just a good connection than it is awesome already IMO

Now, it's up to you guys, what do you do with your FB?