Yes, McDonalds. I think the OP inadvertantly made more of us want MaccyDs in one go than any advert could ever have done. But I find this all the time. People come on to complain about a certain food, and I want it. And so does everyone else. It is mostly food (bunch of gannets) but could be tv show, place to live, car, shop. One person complains they hate it, everyone else jumps in with examples of how fab it is and why and next thing you know, MN has been deserted so everyone can go and buy, buy, buy!
I don't consider myself to be influenced by advertising. I have never even noticed an ad for McDonalds. But I want one now more than I ever have.