As far as doing it publicly, yes. It may not be PC but I don't think it's unreasonable to say that the negative affect it has on others is objectively different.
If it helps you to wrap your mind around it, I'm personally much more affected by people who chew with their mouth open. It may not be rational but it drives me insane. I don't think there is anything wrong with chewing with one's mouth open when alone. In fact, if alone it makes no difference. But if you're in earshot of me it makes a big difference.
Dude, I've addressed this at least twice now in the thread. I didn't see the f'n kiss, I just read the article and I'm irritated by the writer.