Depending on the state, I would simply ignore it until it goes away. I didn't even realize Texas had red light cameras and I lived there for a while. Thought they only had those cameras in the more Statist locales. I guess they want revenue from every source possible.
In NOLA I simply ignored the letters they sent about the violation and they eventually went away. Hertz had transferred responsibility to me and then ATS tried to collect and I ignored. It's not credit so it can't go against your credit.
There is a thread on this.
Speed camera violations