Porn is bad, m'kay?!

I posted a simple thing on my FB. It says "Porn. It's not cool and not ok. Like if you agree. FB/voicesforvirtue". That's all. I have friends that apparently feel threatened by this and need to voice 'counterpoint' opinions. Is it wrong of me to tell them to voice those opinions on their OWN page? It says 'Like if you agree', not rant if you disagree. And, yes, with something as distasteful to me as this, I will politely ask you to voice your opinion on your page. Grr argh. People today.