Using your credentials is not hacking, but once he was canned he no longer had authorization to access those systems. Legally, there is probably no distinction between gaining access by actual hacking vs. using credentials that are no longer authorized.
So yes, their IT processes are deficient, but that doesn’t let the guy off the hook or mitigate his punishment.
Maybe, but it’s still the case that slowing down will impart less energy to the collision. Let up on the brake before impact if you want, but you should have been braking once you first saw the deer in the road.
Sometimes those fuckers just jump out at you at the last minute. They’re not smart. But if you click the link, this one was right in the middle of the road, with that “Deer in the headlights” look. There was plenty of time to slow down before impact.