Let's be sure to separate "Normal" from "common" or "tolerated"
While the above mentioned actions are relatively common in contemporary society, I would definitely stop short of calling it normal behavior. Obviously demographics are a large part of that, but nonetheless, those things do tend to make people stand out in a less-than-positive manner. Personally, I find such things distasteful and my facial expressions toward so-acting individuals are unmistakable in articulating that. Make it offensive enough, and I'll say or do something about it, like the kid who decided to pull up in front of my shop with his rap music so loud it was shaking the windows; I told him to turn it off, he muttered something offensive and turned it up, so I approached him. Evidently, his gonads were much smaller than his subwoofers, because he couldn't bail fast enough when he realized I was serious.