"Manners belong to a bygone age; they are no longer relevant." Attack, defend, or modify

I am half and half with that statement. It's true, most kids these days don't pay attention to manners and don't always use them, but that doesn't mean that they are no longer relevant. I know that me and my two other cousins, we are the same age, use our manners and make sure we do, or else we get wacked upside the head. I work at WaWa so I see a lot of children and teens who are using their manners when we ring them up at register. At WaWa it's actually a lot of the adults who don't use their manners and come in and talk on their phones the entire time. If anything, I would say that most adults don't care about their manners and that this generation of kids are beginning to use them more and more. I'm sure others don't agree, but from working where I do, that's what I have concluded.