It's only a flag. The Flag Code serves as a guide to be followed on a purely voluntary basis to insure proper respect for the flag. The Supreme Court has ruled that politically motivated violations of the Flag Code are protected by the First Amendment.
The Flag Code has no provision for enforcement. No fines, no penalties. There is nothing law enforcement can do when the Flag Code is broken.
Your rules for how to use the American flag are actually pretty relaxed compared to most other countries.
For example, most would not let you hang it from a car unless you are someone quite special. But here anyone can, as long as the staff is fixed firmly to the chassis or clamped to the right fender.
South Africa has some of the tightest rules I have seen.