Look over there ... see that toddler getting off the train with his parents? Those are the people who just vacated the room you're going to occupy, and a few minutes ago Mom changed the toddler's diaper on the very roomette seat that you're about to sit on! The track was kind of rough coming into the station, so there was probably some spillage, but hey ... at least there wasn't a Chihuahua on the floor.
Bottom line: it's
people who are the real animals, and if you're paranoid about cleanliness you ought to spend a little more time worrying about
them.
Look, you don't have to tell me about children - aside from having them myself (and teaching them to be neat and well behaved in public at the same time), I just had a trip back on 19 last week in a roomette across the hall from a family of four (2 adults, 4ish year old, 1ish year old), who completely trashed not only their roomette (to the point that you couldn't even see the floor/carpet through the crumbs and crap, which were tracked all the way into the hallway), but also their dining car table at every meal (all the butter melted in grabby hands and thrown on the floor, sugar packets opened and dumped on the floor, etc - oh, and no tip to boot).
Seeing as how I somehow survived that ordeal, though, you can tell I'm far from "paranoid" about cleanliness. I do, however, have a couple of salient points:
1) Children do not, as a matter of due course or nature, urinate or defecate directly on the ground or whatever ground-like substitute they happen to be near.
2) While I realize that children can be just as dirty as pets, I have no control over their presence on trains (nor should I, or do I want to - the wonder on my 2 year old's face on the train is something I wouldn't trade for anything). At present, pets, however, are NOT allowed in the passenger areas, and I think it's best to keep it that way - why introduce ANOTHER potential source of problems, issues and mess?