I don't know if it's still like this, but I actually went through a ton of trouble trying to unsubscribe from LinkedIn emails. I dug through all the preferences and unchecked all the email notification boxes, but the LinkedIn emails kept coming. After googling I found that I wasn't alone in having this problem, as if it were some kind of bug or something.

At this point, I gave up and started marking all LinkedIn emails as spam.

This all happened a while ago, so they may have fixed it by now. But quite frankly, I don't care. I would delete my account, but many legitimate companies I've interviewed with specifically ask for my LinkedIn profile to keep in touch. It's kind of annoying.

I've been using careers.stackoverflow.com as an alternative for an online resume, but it's unexpected to potential employers.