"My kids would do the exact same thing on their own, if we were there. They are loathe to let such a huge injustice go unchallenged. I would explain the ramifications to them first, but I would allow them to do this peaceful bit of civil disobedience."
Mine too. We talk about this case every day, plus they are talking about it at church.
Funny. The morality of this story is obvious to the kids. Mine nailed it right away.