Facebook and what I think

I joined facebook this weekend just to help a fellow knitter who was having problems with the interface. I can not believe how invasive this program is. I'm thankful I didn't sign up at work on my break. They let us check our hotmail accts. at work... but if I had signed up at work they would have sent and invitie to my address book and then I could have been fired. They send an invitation to my blog because I have an email set up to update my blog if I want. Everywhere I go too at my computer at home and some at work I see " Check out my Facebook profile". I would never.. I repeat NEVER had signed up if I'd had known this. I might regret this yet.