On a hot day, when the traffic is backed up 50 cars deep and only 10 cars are crawling through each light cycle, rather than roast in my helmut waiting in line while the car drivers sit in air conditioned comfort tapping on iPhone keypads and playing with the radio, sometimes I'll slowly ride between the stopped cars to the front of the line, in sport mode of course, then launch out ahead of the pack when the light turns green. I won't do it if I think the traffic may start moving mid-course, before I get to the front.
Now technically you're not supposed to do that, but as the bike is silent hardly anyone seems to mind. Heck I don't think most drivers even notice. If I were on an ICE bike I'd have to keep the throttle constant and tweak the clutch to keep the noise and attention level down low enough to pull it off. Even so, the sound will draw too much attention. Maybe that's why it never occurred to me to do it on an ICE bike.
I said hardly anyone because one time I did this and a lunatic in pickup truck chased after me, as if by pulling up next to him, not in front of him, I'd caused him some kind of insult. I pulled over, he pulled over. I hollered at him and he drove away. Other than that, no issues. I ride by police and they don't seem to care. I think it's one of those rules like jaywalking. You're not supposed to but the rule is largely for your own protection. If you break the rule and get hit by a car, the car driver is off the hook.