Here is something else a bit nasty to add to the debate. How about hanging every immediate family member of anyone caught in one of these beheading vids.
Do it publicly on TV if needs be, but make it known that participating in acts of brutality is sentencing your own family to a public death sentence. This would work on many levels, and may stop these vids being aired but may make the occasional family think about how happy they are for their son to go and join in the fight abroad.
Are you really 46 years old?