I voted no change, because how often do people take those stickers off when their kid grows up?? I know I'd be too lazy to do it, and I bet a lot of other people are that way too. So having a "baby on board" sticker is no guarantee that there's actually a baby in the car.
I am, however, terrified of hitting a pedestrian or cyclist. So I subconsciously slow down when I see a crosswalk, whether there's a person there or not, and whenever I pass a intersection or go through a neighborhood I compulsively scan both sides of the street to make sure there's no one trying to cross.
What pisses me off more than ANYTHING about driving is being tailgated.
Normally I am a very polite driver, but when someone tailgates me I turn into a raging bitch. I slow way down, or I tap my brakes if they're getting too close.