Linked In is obviously involved in a massive drive to become a Facebook-sized phenomenon. I’m getting tons of emails supposedly from acquaintances wanting me to join their Linked In circle. I just dump ‘em. Linked In appears to be data mining using Facebook and other social sites to determine who knows who.
That happened to me. LinkedIn sent invitations to everyone I had ever sent an EMAIL from my google account. I still don’t understand how it happened.
However in recent months, LinkedIn has this new "profile update" feature where if you aren't careful, everybody in your address book who is not already connected to you will get a LinkedIn invite. This can be disconcerting if you have a lot of people in your address book who are not work colleagues because they you will have aunts, cousins, casual friends and whatnot getting these invites and they will think you are spamming them.
They’re also using techniques to trick busy-body business people into clicking to upload their contacts for MORE datamining.
LinkedIn accomplishes nothing. Total waste of bandwidth. There’s a real opportunity for someone to drive them under before they sell to someone like Google or FB...