I'll stop eating pineapple on pizza once Americans put an end to the abomination that is round waffles. Everybody knows there are only two acceptable shapes for waffles, and circles aren't among those. And while we're at it, waffles aren't breakfast food. Ever.
Also, I'd have to agree with Aviendha that pineapple stopped being the weirdest thing on pizza a long, long time ago. I'm still a little weirded out by kebab on pizza, though, I'll admit.