Dear people who like PDA: Okay, so PDA is fine. What if you were walking dow the street and you saw two people doing each other? Before you say anything, it's still a Public Display of Affection so it's the same. Don't even try to deny it.

Dear people against PDA: Get over it! They love each other and want people to know. They're not trying to hide it.You see two people sitting on a bench in the park - Oh, no! Arrest these two, they're publicly displaying their affection! They're fucking holding hands, it's no big deal.

TL;DR - Against PDA? Just sit back, do nothing, and laugh if the government makes PDA's illegal and they're arrested and/or fined. For PDA? I don't care, just don't announce it to the fucking world.