You could even say that this page, and people trying to raise awareness for this issue, are harmful!
Imagine a few important people stepping up and saying, no, we will not disadvantage applicants because of their "unprofessional" facebook profiles. In fact, we value authentic, unintimidated people. The act of saying so will make it a little bit so!
We need to shift the blame from people expressing themselves, to those people punishing them for it, or even to people giving well-meaning advice like this.
(Just a crazy thought I just had. Didn't want to be to harsh with the creator, who raises an important discussion.)