You call that a confrontation?  It has to be public with well planed questions and rebuttals to anticipated answers.  He says it's harmful WHY?  What is the harm, call his bluff.  How is helping sick people sending the wrong message to kids?  Shouldn't we then ban morphine, and speed for prescriptions as well?    You let him get off without any embarrassment - better planning next time.  Re-watch those Mark Souder videos!