There is always the immidiate assumption, especially if the driver is young that they were either high/drunk/speeding or some combination of the three.
The accident that took the lives of three of my friends happened on a straight section of road at 60mph. We were in a national speed limit section of A-road, late at night after my gf's 18th birthday. Two were drunk, I was mostly sober and the driver was totally sober - not just legally sober i.e. under the drink-drive limit, totally dry.
It was reported in the local newspapers that he had lost control of the car whilst speeding, and they suggested that he had been drinking. Local parents shunned his mother who had the reckless drink driving boy racer son, and there was constant name calling and shouted abuse at him.
The crash was caused by a blow out.
I know that assumptions are based (at least should be based) on what commonly happens, so it was natural for people to assume he was an idiot. But they shouldn't, no-one knows what happened or why apart from a very small number, so they shouldn't make a judgement.
Grr, I'm not ranting at anyone here, just in general. A couple of posts just reminded me of it.