I told everyone a week or two before I quit I was gonna quit. Those who wanted to keep in touch had a way to do so. Those who didn't, I don't care about. Downloaded my data, deleted my account, and moved on with life.
I think 1-2 people didn't get the memo and didn't read my blog (I blogged about it) and sent me an email wondering WTF.
I do have close friends I primarily keep in touch with using online tools; those talk to me on skype or equivalent.
