Artists as well as protesters have been condemned for using the flag in protest of US policies, but business use it any way they want without censure.
What could be more disrespectful to the flag than using it as underwear, socks, or using it as a sales hook? Such use is also against U.S. rules regarding the flag.
United States Code, title 36, chapter 10, section 176:
(d) The flag should never be used as wearing apparel
(f) The flag should never be used as a receptacle for receiving, holding, carrying, or delivering anything
(i) The flag should never be used for advertising purposes in any manner whatsoever. It should not be embroidered, printed, or otherwise impressed on paper napkins or boxes or anything that is designed for temporary use and discard.
(j) No part of the flag should ever be used as a costume or athletic uniform.