Wasn't there that incident on a FED-EX DC10 that was prevented?
Lets add them all up then and see how many there have been then.
By the way, we are not the only profession to have experienced what are termed "intentional unsafe acts"
A recent article in a Forensic Science journal reported that since 1970 fifty four healthcare professionals in 20 North American and European countries have been convicted of murdering over 300 of their patients and suspected of murdering over 2100 more. (Dr Shipman / Nurse Beverley Allitt etc)
Other murder / suicides have been suspected on the railways (trains driven into buffers etc) and in the Chemical industries. (deliberate opening of volatile chemical pipe valves etc)
While extremely rare, it seems that "intentional adverse events" may be slightly more common than we might be expecting.
Some of these guys seem to want to get themselves in the record books.
Should we not give the matter some thought before we have a "nasty" ?
Rather than doing nothing until something happens?