Good stuff Wade. I would add there's now a danger worse than the cell phone glued to the head. And that's texting or reading Facebook while driving. I see this more commonly now than talking on the cellphone (which is illegal here). You can tell because the head is slightly tilted down as they hold the phone where you (and so the cops) can't see it. They will glance up every few seconds but most of their gaze/attention is on the phone. Not surprisingly this is mostly young females (I said mostly) and in my opinion is much more dangerous than driving drunk, but they think its ok obviously.
My strategies to guard against these potential murderers is to cover the controls (brake, horn, clutch) flick on my headlight modulator which usually gets their attention from their peripheral vision. I have a very loud horn I don't hesitate to use (but you can scare them into doing something impulsive) and assume they are going to be homocidal/suicidal. rant completed