I suppose the good response would be "The term is pederasty, you retard!" I suppose the best response possible would be to be waiting with predrafted legal pap

I suppose the good response would be "The term is pederasty, you retard!" I suppose the best response possible would be to be waiting with predrafted legal papers for slander and ask "Sir what is your name?" when they're forced to respond simply fill out their name and say "Consider yourself served".