the bad/the ugly

The last time I checked, the correct thing to do was to cross the road when the light for the cars and the pedestrians turns green.  I am not saying that I always cross the road at the lights, but usually I do, not wanting to be another casualty of the dicey road system they have here.  But recently some particularly angry motorists have taken it upon themselves to give me a blast of their horn if they need to wait 5 seconds while I cross the road with the pedestrian light IN my favour.  Really people, is it necessary?  Are you so angry with your life that you need to show your anger in a situation where I am doing the right thing, and you are using your warning device in a way other than was intended?  Somebody needs to teach these motorists a lesson in etiquette, patience and manners or I may just ruin mine by accidentally kicking your car the next time it happens...