The OP should fight the ticket. This might lead to a reduced fine, which is about the best you can hope for in the immediate term. However, the reason Idaho stops became legal in Idaho has little to do with cyclists trying to change a law, and much to do with judges who got tired of seeing their already overcrowded court rooms wasting time on such petty infractions. Doing your part to clog the courts and raising the cost associated with enforcing such a ridiculous law may eventually lead to either the law being changed, or at least still less enforcement.