How employers demanding access to Facebook accounts can backfire

A fictitious letter of resignation makes the point that if employers demand access to the Facebook accounts of employees or interviewees, the employers become vulnerable to all kinds of anti-discrimination lawsuits:

My ability to select the best candidates for our positions has been irreparably compromised by looking into their private lives. I’ve been “tainted” by knowledge of their sexual orientation, illnesses, religion, political affiliations, and other factors that expose us to anti-discrimination legislation. We can’t even claim that the employee improperly disclosed these matters to us, as we are the ones initiating the investigation of their private doings.