I think there's a fine balance between "being a dictator" and "upholding the standards", which the CA:s need to be careful with.
On one hand, the CA:s shouldn't be afraid to tell a mapmaker when the quality of the map is not sufficient.
On the other hand, the CA:s shouldn't let their personal opinions affect their judgement too much, and if there's generally lots of support for a map, then the CA:s shouldn't be holding it back purely because it's not to their personal tastes.
It's a fine line to walk on sometimes, and there's no easy answers. But one thing we should all consider is, why are we making maps? Is it for the enjoyment of the public, or is it for some other purpose? I think, the primary purpose of any map is to be fun to play, after all that's what people come to this site for: to have fun playing games on maps. If the public wants to have a few "silly" maps, if they find them fun, then should we deny it from them because some us feel they go against some arbitrary artistic standards we have set for ourselves?
I mean, here's the problem with Dim's argument: who gets to decide what is "a stupid idea", who gets to define what a CC map should be? What some see as stupid, others see as brilliant. I think there are several stupid maps already on CC - Crossword, for one. If we can have a map of a crossword puzzle, why not a cow? Where does the line go, and who gets to decide where it's drawn?
Then there's the slippery slope argument, that if we allow this map, then doom & apocalypse will come, cats and dogs living together, etc... I don't buy that either. Like I said, there have been stupid maps made on CC before, like Crossword. However, the opinion that Crossword is a stupid map is a personal one - some people like it a lot, it's not one of the most popular maps, but it does have a niche following. Crossword was made years ago, and yet CC wasn't flooded with nothing but stupid puzzle maps afterwards.
So anyway... long story short: yes, standards should be upheld, but we should also keep in mind the purpose why we make these maps. I think, sometimes we lose ourselves so deep to the art of mapmaking, that we forget why it is we make them. That is, to give people something fun to play on.