I'll also jump on the band wagon that deleting it is a bit of a bad idea as much as i hate facebook too, but if you actually read the full terms and privacy you can opt out of moat things and they only really effect you if you have other services in the "facebook company" group much like how google tracks you across everything with their ad ID it's the same with facebook. read the terms and privacy thoroughly and you'll see it's not all that bad and this is coming from a strong hater of facebook