Hoverman, I don't understand your post - on the one hand you say that even one cannot be tolerated - on the other you say we're overstating the problem...
You're right that not even one can be tolerated. However, this is a serious problem when you examine the statistics that the various safety bodies come up with. It is also one that is growing.
How do you overstate the severity of a hostie having a vodka bottle broken over her head, then repeatedly stabbed and slashed with the broken end, being left on the tarmac, bleeding profusely, but surviving to be so traumatised that even flying is a nervous trial for her? Or how do you overstate the severity of a nutcase breaking into the flightdeck, trying to seize the controls, sending a full passenger jet partly inverted and giving the F/O significant problems in recovery?