rarely would you see niceheads like these two in public spaces. and they seem like random niceheads, not community service yu, since they don't have any badges.

Yeah, a random stray nicehead in civilization is almost unheard of. Sometimes you'll get niceheads in clan stories, but when you're dealing with non-pets, the primary determiner of "goodness" is being completely unwilling to go anywhere near humans.

Now trash can throw trash. One is flammable the other is not.