No; Breast cancer results from a tumor with mutant DNA growing in breast tissue. This has nothing to do with wearing tight clothes.
You can always be sued for hurting someone. Is it worse to hurt someone while wearing a bullet proof vest? Not particularly.
Not necessarily, unless they have reason to suspect you stole it or are lying. That said, it'd be regarded with suspicion and will not make anythign easier for you.
It might well depend on the wording of the law in your particular state. Are felons prevented by law from possessing or wearing bullet-proof vests in your state?
Yes, although in reality you may be stopped and questioned by the Police under terrorism legislation.
Ambulances are not bullet proof.
No. People are not bullet proof.
Probably not, but you need to research the laws in your state. A bullet resistant garment is completely defensive.
No Tungsten is NOT bullet proof.
No airplanes do not have bullet proof glass.
yes if you add bullet proof material
A typical football helmet is not bullet proof but someone could create a bullet proof football helmet.
In the U.S. having a bullet proof vest isn't illegal unless you are a felon (in some states) or are committing a crime while wearing it.