If you're trying to get recruiters to leave you alone, why are you using LinkedIn?

In an age when prospective employers often want to see your social-network profile, LinkedIn makes an excellent honeypot.

This implies that the only use of LinkedIn is to be courted by recruiters.

Try "Rockstar Cobol Hacker"; if the recruiters are paying attention, they'll either be unable to find anything that meets the intersection of those sets or they'll have something so interesting it'll be fun to read about even if you don't go with it.

Of course, there's nothing you can do about meat-zombies spamming crap to everyone.