Yes. Pineapple on pizza is an abomination.
Discussion
i've done it before. it does unspeakable things to the cheese but its actually not as bad as one might think.
it is however, not something i'd do that often, and havent had it like that in literally YEARS.
best with various umame causing combinations.
pineapple - sweet
savory - olives
salty - anchovies
spicy - cayenne.
= umame.
= win. you'd be surprised.