I am absolutely against them - and any other technology that forces you to prove your innocence.
So you want to improve safety around traffic lights? Easy
Make all yellow lights longer, and make them all the exact same length.
Problem solved.
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Cameras are the antithesis of this approach. They put dollar signs in people's eyes, often resulting in shorter yellow lights and increased risk of accident around the light - all to generate a few more dollars. Don't be fooled by the "the money is going to schools argument". The budget of the school system doesn't increase when fines or lottery money is added. Their primary funding is just cut and they end up with about the same amount in the end.