"National Punch A Slut Day"

As I was strolling around on Facebook once again there was another degrading event to women. Which was "National Punch a Slut Day" apparently it takes place on April 30 all day, and it says that if you see a "slut" to punch her. What exactly defines a slut and who does it apply to, I don't know. I just thought this was extremely crazy. Guys are commenting on the event saying outrageous and violent things like "I cant wait to punch the f***ing s**t out of this girl I know" or "All of the girls deserve it" and more outlandish things. To me, it just seems like our society promotes girls to promiscuous, and then when they are they are insulted and outcasted for doing so. Sometimes I feel like our society, wants to be accepting and attempts to be accepting but then when someone rebels they rebel. I believe we are so worried about being judged by others that we never actually let our own self show and when we do, we get called out for it.