Your radio should play the start tones from the old "Pole Position" arcade game when the light is turning green. Boop...Boop...Beeeeeee
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Just allow texting at redlights. Sure it's annoying, but not dangerous. People aren't going to stop texting, so encourage doing it in a safer manner rather than the less likely to get caught but more dangerous manner. It's a reasonable compromise.
Annoying, but not dangerous. The texting law is supposed to save lives, not as a revenue generator.