Isn't it strange how they can see it for what it is when a foreigner does it, but they're so blinkered when a Thai person does it. If they would kick up a fuss every time a Thai driver drives dangerously, or gets and inappropriate penalty, maybe the roads would be a little safer in Thailand.
It actually suggests that one of the reasons that the roads are in the state that they are, is that Thais are incredibly tolerant of dangerous and criminal behaviour when it is done by other Thais.