You know we still want to attract people to the game, right?
It's hard enough getting people to play with ASCII graphics, a learning curve that resembles a cliff, and an overwhelming amount of depth paired with a clunky interface, the last thing we need are things like this.
As an already experienced player though, I'm all for it!
Are you serious? Not to be a smartass here, but that's way off base. The ONLY reason I was able to find and start playing DF is because of two things.
1: TVtropes' video game cruelty potential entry.
2: #1's eventually link to Boatmurdered.
Horror, violence, carnage, gore, and death. Starving babies, gouged eyes, water traps, flying limbs, puppies with lungs missing, etc.
Adding feces to the game adds more to the carnage and fun of it. Adding realistic wound systems (as of the last update) made the game that much more attractive. There is simply NO other game that can ever compare to DF in regards to these features.
Why not go all the way with it? Sex, feces, urine, an actual crime system (which isn't based on tantrums, but rather greed, squalor, and general human traits), mixing liquids, expanded insanity (including personality disorders), the list goes on.
This will attract more players, I promise. Billy-Bob WoW's headache over learning the game doesn't concern me. Designing a complex, realistic, and ultimately godlike fortress (and thus a godlike experience) is the entire idea. Fun, fun, fun.
Complexity is no reason to exclude something from the game. That's just my opinion.