This one factoid is the thing that keeps me the least interested in having a jobby-job. The fact that it is now de rigeur for some fuckin' HR flack to sniff around your social media feed before they'll offer you a job is fucking horrifying. I can think of nothing so demotivating. The last jobby-job I had, the HR bitch that laid me off tried to friend me on LinkedIn a week later. I can't recall if I actually wrote her back "you're fucking kidding me" or thought better of it. I heard they laid her off six months later.
One of my friends suggested that if I created a Linkdin account and a fake Facebook profile for myself, my job hunt might go a bit easier. I straight up told them that any company that wants to snoop on me as a factor in whether or not I'm employable is a company I don't want to work for.
I'll defend the LinkedIn suggestion. I have a LinkedIn account I keep sort of up to date. I do not have a Facebook account. LinkedIn can show an active interest in the employer or the career path, and that can help convince an employer that a candidate isn't looking at them as a passing fad or just a paycheck. It isn't about having a fake account or even pretending to be interested when one isn't.