If someone says "I'm a recruiter", then you can choose to add them or not. Me, I don't have any interest in unsolicited recruiters trying to pester me ... I consider them like door to door salesmen or spam; I'm just not interested.
But, yes, some people do choose to link in recruiters. I personally won't do it.
This fake that I saw the other week ... it was really hard for me to identify what the heck it was. It was written in such a way as to insinuate he'd worked at a place I knew, but fell just short of stating it .. the more I read it the more I became convinced there was something quite slippery about it. In the end after some pretty careful reading I concluded the profile wasn't what it claimed to be.
I find it highly unlikely nefarious super hackers are personally targeting me, but if it was a recruiter it seemed like a pretty well crafted way to lie your way into someone's network ... and any recruiter trying that hard to mislead you about who they are isn't someone you should be trusting. At all. Ever.
So, either it was what I'd consider a really shady recruiter, or some other shady entity.
Either way, people in general need to have a little more "street smarts", both on the intertubes and in real life. Because, there's an awful lot of humans who are complete bastards and need to be distrusted. Not nearly enough people stop to think "just who the hell is this person and what are their motives?"
Which is precisely why social engineering and other con artists are so successful.
Some people think being wary and distrustful is a bad way to live .. me, I have seen enough of crap like this to know that it's better than being someone's mark and realizing you've been ripped off.