I agree with acts of civil disobedience in the face of unjust laws and a general distancing from a government that does not take action to correct unjust laws. Philosophically "unjust laws" are "human laws not rooted in eternal and natural law". However this definition given by Aquinas seems too broad and idealistic to me.

I think the best examples are Martin Luther King Jr. and Rosa Parks and others during the 1960s civil rights movements. They broke laws in a peaceful nonviolent manner to demonstrate that those laws were not just laws in a hope that the laws would be changed. They were willing to pay the full price for breaking the law and they did so.

Considering this I would say that if one determines the law to be unjust and demonstrates civil disobedience in a nonviolent manner and is also willing to pay the full price of breaking the law, then it is more than OK, it is honorable to do so.