Subliminal Advertising The United States ad industry consists of many agencies whose job it is to make sure that the American consumers buy their clients’ products. As many people get smart enough to look past the physical eye tricks the ads may play on them, the agencies have turned to subliminal messages to get their point across. From garbage bag advertisements to those for hard liquor, subliminal advertising almost always has an effect, usually without people even knowing it. If a company has the money, the time, and an attorney well versed in constitutional law, there is no reason why subliminal messages cannot appear in their advertisements.