Yep, one time someone ordered a half plain/half pineapple and ham pizza. I wouldn't even eat the plain side because the pineapple germs may have contaminated the plain side.
Processed Cheese Food. Of any color, be it orange, white, or whatever. Fake parmesan from a can. Fake meat products. Once in Europe, there were sliced bananas on the pizza. That was a first (and a last). A dear friend bought the pizza, so I had to smile and eat it. Hmmm... it made pineapple look normal.
I frankly don't have any problem with anything that might be considered a traditional topping, including everything mentioned here that qualifies. I'm also a fan of Cheese Board in Berkeley (and occasionally some of their Arizmendi followers) where I've tried everything including potato, pine nuts, peach, and wild mushrooms. Some come with lime to squeeze, or ones where they toss arugula on top.
But that would end with this abomination from Pizza Hut Malaysia. I do find it interesting that their commercial is in English.