Let's say that I was dying of cancer and marijuana was the only drug that helped deal with chemotherapy. In that case, I'd probably sit down with my kids and explain why I chose to break the law. In that case, it is also likely that I'd have a sympathetic jury if someone decided to prosecute me.
It is quite a different thing to tell your kids that you are going over to your friends house to get high because you want to relax on the weekend and you think marijuana laws are wrong.
We all want progress, but if you're on the wrong road, progress means doing an about-turn and walking back to the right road; in that case, the man who turns back soonest is the most progressive.
-C. S. Lewis