I always LOVED potato salad until I got sick from it. I was battling a bout of really nasty unknown flu type symptoms when i heard on the news that the potato salad I had eaten a few days earlier was recalled due to it containing listeria. For some reason i just have not been able to eat it since....
Be sure to read the rest of the article; it is quite fascinating. It's also interesting to note that one of the related articles listed on the side is titled "Smarter People Are No Better Off"!