I vote no because I like these forums and I don't want them flooded with feces humor. The fact that this is about feces specifically rather than general filth makes arguments towards realism suspicious. Half the existing workshops would produce hazardous waste at a much quicker pace than a dwarf's daily poo break.
Right. The fact that people gravitate specifically towards fecal matter is a tad suspicious.
I'm sure most people here are actually refering to sewage in general, and that it's the title of the thread that makes them (or rather, us) use the term 'feces' instead.
Also, just because those games handled feces and the like poorly doesn't mean that DF will. And as most of DF's features are automized, there's no reason why sewage/feces wouldn't be, too. Once you've got a proper sewer, or perhaps just simple holes in the ground for those who can't be bothered, up and running, that is. So your "It will be too tiresome to handle manually."-argument is flawed.
Either make primitive holes in the ground which you cover up with floors, (but why you would ever do that is beyond me, as there currently is no penalty for stacking things ad infinitum (unless the sewage is handled as a fluid, which would be fitting)), or make a nifty, automized system with pressure plates and such which flushes the contents of your sewage-hole, (or perhaps even interconnected holes (that is to say, a real sewer)) into a bottomless pit, or maybe into the ocean or whatever possible permanent dump-site your fortress is located by, once it reaches a certain level.
(This probably counts as a very minor spoiler) Somebody in another thread gave the suggestion that blood men should spawn in pools of blood, and I think it would be fitting if it were to happen in sewage aswell, as it would both act as a deterrent from using ridiculously simplistic waste disposal systems, and would create some sort of 'low-level' dungeons for adventurers, or even your recruits, to train in.
And lastly I'd like to point out that most, if not all, of the people here support the option to turn it off so those who prefer the regular DF feel can play without it.