Personally I snitch on jowan every time, since I found out that I could (tough love). Plus I am against blood magic completely so yea, gonna shut down that blood mage! I found out about a mission that pops up on the chantry board if you let him escape redcliffe and tell him to leave and you never want to see him again.
As much as I agree with that video and want to smack Jowan every few minutes, I still love him. And in my little ficverse he gets conscripted into the Wardens. LIKE HE WAS SUPPOSE TO BE IN THE FIRST PLACE!!