One example of something that negatively influenced me is a PlayStaion game, called Pepsiman. I remeber that the game made me beg my parents to buy 64 cans next time we went to Costco, I had one every day. This was not only negative for me, but also the environment (although I recycled, not everyone does).
One thing that positively affected me is the movie The Lorax, as it depicted a world driven by consequentialism, and showed the compremises needed to face when all of nature has been destroyed.