Only a certifiable moron would watch the brake lights of the car in front of them to see if they are at a complete stop at an intersection. Your analogy is not valid, I have already signaled that I'm braking and at a complete stop and will begin forward motion when the light turns green, which the motorist behind me is looking for too. What about a driver that puts their car in park at an intersection, does this confuse the other drivers too. Just because you can't do a decent trackstand without falling over and scaring everyone around you doesn't mean you should make up nonsense reasons why the rest of us who can shouldn't do it.