That's hilarious. If I was running a magazine I think I'd require that people send in a picture of a monkey along with their submission, just to prove they read the guidelines.
I heard of a rock band (I'm thinking the Grateful Dead but don't quote me on that,) who added to their contracts that they needed a giant bowl of only brown M & M's in their trailers, just to make sure that the promoters were paying attention to the minute details of the contract. That was important because they used twice as much on stage equipment so they needed a more reinforced stage. One time they didn't get the M & M's but when on anyway and the stage collapsed. Of course this is folklore in my head because I don't have any sources.