Never
We don't break the law to make a point when the point can be made without breaking the law.
Well, with some people, you can't make the point no matter what you do, or the legality of it. Since the only people we can hope to influence are the genuinely misguided and misinformed and the fence-sitters, this is sound advice.
I saw another collage of stupidity from "our side" on a Colbert from a few days ago. It ended on a video of James Yeager threatening to kill people. With friends like him (and so many more), we don't need enemies.
We'd be better off if we kept cool heads and let the other side shoot off at the mouth and break the law.