That only works if they already know you. If you wanna start something new, it might benefit from having the outreach that facebook has.
Guys, you're proving what everybody is starting to realize; Facebook has become masters at making people addicted to them. Every excuse I see like this one is nothing more than justification for an addiction. I hear it all the time. Me: "I'm not on Facebook." Them: "Oh, I could never do that" and then the proceeds to outline some extenuating circumstance that they claim is unique to them which is in fact unique to NOBODY. Because Facebook is that good at making people addicted to it.
I challenge you to try it. Disable your account for six weeks and see how you feel. If you're miserable, fine. Go back. But at least try it!