If you aren't riding the brake lights, who cares. But as evidenced by mech, it is really easy to do since your foot is more in the air and wants to rest on something (like the gas pedal). Plus you don't want to drag the brakes (anti-efficiency)
So, like not going slow in the center lane, don't ride your brakes, you will look like a serious geezer if you are coasting slow AND your brake lights are flashing
