Yes. Though I believe some vendors caution users about using the feature in the U.S. There are probably permissible uses for it, such as bona fide network maint

Yes. Though I believe some vendors caution users about using the feature in the U.S. There are probably permissible uses for it, such as bona fide network maintenance and security. So I don't believe that the feature itself is illegal--Marriott just used it in an illegal way.