Hey LinkedIn kind of shameful y'all don't have a customer-facing feature release deal, but I have an idea for you that would be JUST SMASHING!!!
I guarantee you that so many folks, at least us poor beleaguered technology folks, would gladly pay for recruiters and unsolicited salespeople to not be able to even view our profiles, let alone send us a message unless it was a reply threaded to our initial inquiry... let alone show up in anyone's search results about anything.
I'll even submit a real PR if you tell me where to do it!
Please advise, sincerely, a technologist who is tired of getting twenty notifications and ten recruiter emails asking if I want to move to the bay or Cambodia when I have not indicated I am seeking employment or contract work.