I wouldn't want to show my "private parts" in the US either, I don't want to get arrested.

US-Americans should get a little self control and stop caring for what other people wear or don't wear. I thought it'd be the land of the free, and not the "land of the free unless don't look like we want you to look"

Well whatever, there is more serious stuff going on in your country (or in every country for that matter) and it's imho almost grossly negligent being so nitpicking. Not only you, generally speaking.
If you're afraid of a thirteen year old shooting you because you ask him to pull up your pants you should really, really reconsider.