I'm not sure how it is in other parts of the world but where I live it's actually rare that people stop completely at stop signs.

The riskiest scenario that I see often, and always am on the lookout for, is when some asshat is coming up to a stop sign looking to enter a road and they are only looking to their left to make ensure they don't get hit while turning right. They rarely look right to see if anyone is crossing the street because, I guess, that's too much to ask. All of this so they can get somewhere slightly faster. We have very little enforcement here, but I don't know if that would even change things.

I imagine it's the same all over. People are people.

Super sad story and to leave someone behind to die without even trying to help and/or take responsibility is horrible.