No one actually cares about manners or neatness anymore, either. It's not good to do things just because everyone else does, Phil. Because, just think what the world would be like if everyone tried to act like one person. Everyone is unique because they are each - one of a kind. But if everyone was acting the same, they wouldn't really be unique.
People are also unique because they have their own way of doing things.
I see what you mean. They will still act like that. Well - most will see it's ridiculous. Others might need just a few words from you. But if they still don't care, don't worry, one person can't control everyone's lives anyway.