Considering this: Under the Federal Trade Commission Act: * Advertising must be truthful and non-deceptive; * Advertisers must have evidence to back u

Considering this: Under the Federal Trade Commission Act: * Advertising must be truthful and non-deceptive; * Advertisers must have evidence to back up their claims; and * Advertisements cannot be unfair. (via http://www.ftc.gov/bcp/edu/pubs/business/adv/bus35.shtm http://www.ftc.gov/bcp/edu/pubs/business/adv/bus35.shtm) Legally it can't be deceptive.