Yeah, I didn't say that it was completely and totally unrealistic for them to be at least a little sad at witnessing a stranger's death. What is annoying, however, is how we can't have our Sims leave the lot in order to them from prevent witnessing the death, and they're forced to go over there and witness it, giving them that horrible, powerful two-day sad moodlet. If it was a very close friend or family member, I could definitely understand the moodlet being that strong, but for a complete stranger? Not so much.
I definitely agree with you. If the above cannot be done, then I do think that it would be a good compromise to just make the moodlet for witnessing a stranger or minor acquaintance's death significantly shorter. A few hours, rather than two whole days. All in all, there seems to be a lot of problems with this kind of thing lately.