Here lie the random thoughts... oh, forget it!
When was the last time you can recall you saw a properly done hand signal by a motorist*?
I can't even remember the last time I saw one by a bicyclist.
Luckily, most of the cyclists around here do use them--in between dodging the notorious L.A. traffic. I always notice them... I used to be one (ages ago). Shaved legs and all ;-).