Dude in iT, never had that problem and even doubled my salary through linked in. Anytime I actually interact with a recruiter I lay down my bare minimums and won't even bother responding further/block if they can't hit that.

That said, LinkedIn is a shit hole not worth touching more than once every couple of years if you're not looking for a gig. I don't even really interact with people I actually know in there because the platform is terrible and 90% of public posts are from sociopaths who despise work life balance.