User blog comment:Crazy sam10/CoDWiki News - March 02nd 2013/@comment-1840877-20130303081420

I have an answer for this week's question, too: it's to do with the humiliation factor. If you throw a coconut at somebody, it'll be pretty painful, but it leaves little to no visual damage. If you hit them with a tomato or an egg, on the other hand, you'll make a big splat and your target will be covered in goo. This makes for a much more humiliating experience, as they have to explain to everyone why they're covered in gunk.

The More You Know... *shooting star*