The teens embrace it as an expression of their inner self through the use of their clothings.
If you look fresh, it implies you are doing OK in your life.
Most argue that swag has turned most gentleman and ladies into desperate attention seekers. but if you consider self expression, hating on someone already implies you oppose them. whether you like swag or not, it is a new movement that the next generation is embracing.
Either you SWAG up or leave it alone.