Same for me. I started forming suspicions when my kids came home from high school talking about how their teacher told them it was okay to have an ounce of marijuana. (This was at the time Colorado had just passed their MJ legalization law, which of course contradicted the supreme federal law.) At the time I didn't realize the extent. Looking back I see that was an earlier sign. At my high school we had some liberal teachers and some not, but most tread the line of open (civil) discussion and everyone's right to have an opinion.