I've never felt a need to use Facebook(or Twitter, or Tumblr, or Flickr, or Instagram, or Formspring, or Blogspot... I think I had Myspace and Livejournal but never knew what to do with them so they went unused) because I think the whole concept is... pointless. I can see it being useful for celebrities or businesses, but individuals really aren't in need of it, and their desire to push real names over handles puts me off totally. I have no desire to contact people I went to school with, to post every little thing I do, etc.
Trust me- log out and don't go back. You won't miss it after a time.
As for the arguing thing.... the only thing a person needs to make a total fool of themselves is a chance. This is another reason I see Facebook as junk, it's become almost expected for people to post everything, and I mean everything they do and think online.