Background Noise ( subliminal advertising )

None, if they want to continue advertising in the US. The broadcaster could lose their license with the FCC. Not even a slew of Super Bowl ads will make up for the revenue lost if the FCC license is yanked.
http://smallbusiness.chron.com/laws-subliminal-marketing-69892.html

What I meant by "subliminal " ( "under the threshold ") is the fact that people (despite desperate attempts by advertisers) don't really pay attention to commercials.
This is a partial list. I started a list ( before Columbine, which I think is significant) because I thought there would be a list.
A.T.&T., Budweiser , Sprint, 1-800 Collect, Southwestern Bell, Shake and Bake, Rogaine, Ford, Denny's, Burger King, Revlon, Panteen, PMS Escape, Cepecol, On Star, Electrasol, Ameritrade, Mitsubishi ( * ) , Electrasol ( 2 ads )
( "I hate it when I open the dishwasher..." /
"I hate leftovers. " )
( * ) not American company

These were all on an old sheet of paper. ( broadcast within 1-2 years ( ? )

Your sense is very sharp about this. I don't watch many advertisements promote American products, actually I don't pay much attention to any adverts, so I cannot address to the topic directly.

But I'm interested in the issue you raise. As I know, none of the words in commericals are inadvertent or off hand. They hire psychologists to study the common psychology of the (certain target) consumers, and deliberately arouse the sensory reactions with the pictures and words. I don't figure why "hate" is applied there you mentioned.

When it comes to background noise, you might hear about a piece of Music named Black Friday by a French artist, and it was reportedly that hundreds of people committed suicide after listening to the music. Unfortunately the music is not available in the world any more. I'm really very interested in listening to it.

And this reminds me of another story about subliminal suggestion. I just searched the relevant report from the Internet.


Source:
2 Families Sue Heavy-Metal Band As Having Driven Sons to Suicide, New York Times.

This is called embedded commands.

PS. If you are interested in, I would like to share and discuss with you more about embedded commands or subliminal message. I'm not sure you want, becasuse they are not directly relevant to your topic.