I look up people all the time. And BTW, this is exactly what social media is for. People make profiles which is sort of a calling card or branding. If it's private then it's private, but the general point of it is to be out there.
Once I looked up a work acquaintance due to her general odd behavior. Not on FB, but court records. ( Her Facebook was covered with dog memes, who cares.) Yup, numerous clashes with the law regarding 2 peace orders, financial debt, and a couple of law suits. A lot made sense after that.