they do it because they don't want to be the least bit uncomfortable (i.e. hot and sweaty), so they sit in there, usually in front of the grocery store, with the car running and the windows up. i go on rants because it is horrendous here how ignorant people are. i often go up to cars, tap on the window and a) ask them if the've ever even heard about global warming, and b) remind them that idling is illegal in toronto. i've only been told to fuck off once. ONCE! most people look sheepishly at me and turn off the engine right away!