Sure, I generally don't too. It was just that it seemed you were stating opposition to the recruiting concept, which wasn't so much what the post was about. But I agree, they're related things, and also that either might very well start with sharing address book information.

(I wonder what Facebook would do if I *did* share my (work-related) email info. Be confused, probably; I have never populated its address book, and it doesn't do so automatically. It would probably make my life easier if I didn't type everyone's emails by hand all the time, but somehow I just never started...)