Not just on tv... This patent, registered in 2007, claims the use of an integrated system in which a customer, upon entering the store, is identified by one of several types of biometric devices. The system then ranks the customer on a variety of factors such as their credit report, income, spending, history of complaints, and more to assess whether or not the customer should be targeted with positive incentives to get them to stay or "aggressive" disincentives to get them to leave, including the use of subliminal messaging. www.google.com...
No joke and it's not the work of a couple nut jobs making crazy patents. Who are Angell and Kraemer:
The use of subliminal have been used in shopping centers for a while now. This is a future variant. God only knows what is being used currently.