Occasionally, I get emails that are purportedly from LinkedIn. They tell me that someone I know is asking me to join. Mostly, I know these people and there is even a photo of them in the email. Why any of them want me to hook up with a professional group of which I have no known connection (I'm not an astronaut, social worker, nor a hit man) is beyond me. Invariably, there is a request to click a link to verify that I know this person. Being of sound mind, I never do it.
I do not participate in LinkedIn, Facebook, Twitter or any other social media, nor do I have any intention of doing so.