LinkedIn's "shadow profiles" are absolutely horrific.

I deleted my LinkedIn account over five years ago, and hunted down every "no, really delete" option I could find on the site and in their emails. It didn't work. LinkedIn will still happily let users and recruiters find my old ghost profile and try to connect with it. I have quite a number of former co-workers who think they have a contact channel with me in LinkedIn even though it would never reach me. LinkedIn isn't just a nuisance, it's actively poisonous and dangerous.

I'll be doing all my future job hunting on StackOverflow Careers, thanks.