Well, this isn't the best example since I never was a serious Jack in the Box customer (vegetarianism + hamburgers don't really mix), but I did used to get milkshakes from them from time to time. Then in the aftermath of 9/11, during that brief window of national unity when everyone was feeling all patriotic, they launched this really jingoistic ad campaign about how great America is and how you should eat at Jack in the Box. And it really pissed me off. You should not exploit the horrific deaths of thousands of people to make money for your company. That's extremely disrespectful, and I dislike the subtext that if you don't buy their shit you aren't American. So fuck Jack in the Box. Like I said, I wasn't a huge fan to begin with, but I sure as hell haven't bought any milkshakes from them in the 11 years since then.