Turn signal, great invention, but...

There is this thing called a turn singal everyone has in their car. It helps prevent accidents by letting the person behind you know you're about to slow down and turn or that you're going to change lanes. Maybe if more people used this feature their would be less accident claims and such. Pretty sure this is on the level of driving with a cell phone in hand(for all those people that apparently can't drive with one hand and actually pay attention to the road). I guess it's just not "cool" to use a turn signal.