Back in high school I went through a brief BK chicken sandwich phase. I thought they were good. One night I woke up with some kind of food poisoning. It sucked. Haven't had one since.
I got food poisoning also from those BK chicken sandwiches also, driving back from the Saints/Dolphins game at Tiger Stadium, both my wife and I got the BK chicken sandwich, early the next morning we were both sick as a dog.