Comment Someone didn't read the screen, methinks. (Score 5, Informative) 210
I know LinkedIn offers to read your existing email accounts for contacts, so that you can connect to them, but you can just ignore that. It isn't mandatory, but if you don't read what it says on screen, you might think it is. So I'm more inclined to suspect that's what happened: the complainant entered his email address and password when prompted, and now thinks he's been hacked.