I think air rage can occur w/o necessarily having safety compromised. Example I saw did not even involve alcohol. A nicely dressed man and his wife on an AA flight out of DFW refused to budge from seat assignments they had before we switched to different equipment, where they would not be sitting together with their new seat assignments. I'm sure if they would have asked politely that someone would have switched their seats, but they basically told in turn the pax, the FA and the pilot to "Go to Hell". The pilot announced a delay and about 15 minutes later a marshall came on the plane to escort them off.