What is that with family members going on linkedIn? My aunt is a retired teacher and she went on linkedIn under a (religious) pseudonym and tried to connect to

What is that with family members going on linkedIn? My aunt is a retired teacher and she went on linkedIn under a (religious) pseudonym and tried to connect to me. And I also got endorsed by a university professor who never taught me (but we knew each other a bit) about ruby on rail that was not yet created when I was a student. I'm about to call bullshit on professional social networks (yeah, because each country has it's favorite moreover, so I'm stuck with viadeo, linkedIn and Xing), I never got a job or recruited through that, and they are just annoying with alert e-mail.