Frequently in situations like this, a simple phone call or visit to the city attorney is enough when proper reference is made to the laws (include cites) and request corrective action..
Civil disobediance is seldom the best response - in fact encouraging that is a violation of forum rules. Such activities tend to polarize people too.
See rule #15 "Posts advocating illegal acts of any kind are NOT welcome here. Even if you feel that a law is unconstitutional we do not break it, we repeal it or defeat it in the courts."
If you find a stubborn anti city attorneyor city council, a Writ of Mandamus should take care of the problem.