I have no doubt that speeding tickets are given out more for reaching a quota than for public safety, just like sobriety checkpoints are more about money than safety, but public safety can still be an effect of the actions regardless. Every time there is a sobriety checkpoint, word gets around quickly that day beforehand, and many people who might have drank too much and then driven, scale back on the drinking, and the roads are safer, at least that night. That is a good thing.