Everything we see, hear and experience influences us. Everything. Why do you think pharmaceutical companies advertise prescription medication on television? It's not so the doctors will be influenced enough to prescribe it, that's for sure. It's because people fall for that stuff.
You may not eat Tony's brand of cereal, or wear Fruit of the Loom briefs, but you probably eat some brand of oats, and likely, hopefully, wear some kind of underwear. I'll bet you even buy batteries, be they Energizer or CopperTop or something familiar. Some of the best advertising minds in history put together some of the most successful campaigns in history during WWII. Loose Lips Sink Ships and Rosey the Riveter were two highly successful recruiting campaigns, not to mention the Buy Bonds ads. Rosey recruited two million women into the workforce to support the war economy. The underlying theme was that the social change required to bring women into the workforce was a patriotic responsibility for women and employers. Those ads made a tremendous change in the relationship between women and the workplace. Employment outside of the home became socially acceptable and even desirable. Granted, those ads only had minimal subtlety, and the more modern ads run the gamut of in-your-face to extreme subtlety, but the effectiveness cannot be denied.
Never mind that Apple's "Think Different" ad slogan is a grammatical abomination, it used some of history's most innovative thinkers to associate great minds with Apple, and if you used an Apple then you were smart, cutting edge, different, creative, while everyone else was just a mindless lemming. The ads worked. Their original Macintosh "1984" ad had no words in the television commercial, just one subtle hammer over the head after another, interspersed with not-so subtle imagery. It was brilliant.
That Keep America Beautiful crying Indian stabbed everyone in the gut with guilt, and it worked. You drive for FedEx, but I'm sure the brand had nothing to do with your decision. :Think Small" sold a snotload of Volkswagen Beetles. The Marlboro Man killed a snotload of people. While you were getting your well deserved break today at McDonald's, Wendy's was screaming "Where's the beef?" Meanwhile, other folks were getting hammered with "Tastes great, Less filling" and then signed up for four years of being all they could be in the Army, all the while looking at uber-babes wondering "Does she, or doesn't she? Only her hairdresser knows for sure."
Have a Coke and a smile, my friend. It's the Real Thing.