I just wonder how brutal they can get away with making him on network television directly associated with Disney.
I think there are ways around it. You don't necessarily have to show all of the blood to portray that Castle is an effective vigilante. I picture an episode where the team of SHIELD agents are tasked with bringing in The Punisher after having monitored his activities for a while. They know he is going after a big time mob boss but his killings have gotten increasingly messy. Basically Castle takes what SHIELD can throw at him and continues to remain a step ahead. In the end they come to an uneasy agreement.