Just wanted to point out that there are State and municipal laws on the books in the U.S. that prohibit wearing masks in public, so France's governmental prohibition is not really particularly exotic. The U.S. laws are generally intended to prohibit hiding one's identity while committing a crime, but some are more general than that.
(I found this overview of U.S. "anti-mask" laws on google:
CND: State Codes Related To Wearing Masks)