“I absolutely would have supported Rosa Parks. She was also protesting an unjust law – how is the law protecting people’s property from vandalism unjust?”
just like you agree the law against blacks sitting in the back was unjust and it was okay to break the law and engage in civil disobedience, so too here the law allowing immoral images in residential neighborhoods with children is an unjust law — as you put it — and it is equally okay to engage in civil disobedience and break that law.