i don't understand this thread. are these theoretical worst breakfasts or the worst breakfast that you've actually eaten? i guess out of any group of things one has to be the worst, but even my worst breakfast (that i can recall) has probably been pretty ok, because if i don't like something, i don't eat it. instead, i wait until i encounter something i would like to eat.
i guess some breakfasts that i've consumed in hotels have been pretty bad, but i've eaten them anyways because they're free. not disgusting bad, but just like, this food is of poor quality bad.