People do all kinds of stupid things.

I work with 2 guys that do this (wrong side of the road, no lights at night) and after talking and explaining things with them about it, they still think what they're doing is right. You'd be amazed at how strongly they feel what they're doing is right.

I think people have to work out for themselves what the best thing is for them to do. If they don't see reason in something (no matter how reasonable) they won't do it.