[lutorm]

Motorcycles do this too, and the drawback is that you are much more likely to run into someone who's just missing the red light in the other direction. And that will be a high-speed differential collision, not anything like contacting the people who are going in the same direction as you.

[pixelbash]

This is more of a risk in places where red light running is endemic. Sadly here in Auckland is rapidly becoming one of those places.