Yes, I'm, sure advertising can have the opposite effect.
I didn't mean to be rude, I just know that there are a lot of sub-conscious effects from advertising. It's surprising how people are influenced without realising it.
A thirty second advert at 8pm can cost £175,000. Believe me Kellogs or Unilever or whoever don't spend that kind of money for nothing!
But if you say you're not influenced, I'll accept that. There are always exceptions.