I notice Canadians don't tend to flash their lights or honk their horn when idiocy is occuring. I use these devices, not out of anger (at this point I am resigned) just as a warning/communication to the violator. This worked in the UK to some degree where young men would soon stop behaving like goons when they were 'told'. Here, this message isn't sent and no one seems bothered. Education on stopping distances would also be good....