"Unneecessary roughness is Necessary" sometimes. If it's a legal choke and it's effective than I don't see the problem. This may not be MMA but every MMA fighter knows that a choke hold doesn't actually restrict the airway. When you apply a choke in MMA your actually cutting off the blood flow to the brain by applying pressure to the artery on the side of your neck. When done correctly your opponent passes out due to restricted blood flow not restricted air.
I guess the question is when is unnecessary roughness necessary. Alex47 if it's legal and it's affective I don't see why you wouldn't teach it to your kids.