So many factors already listed. Peoples' self-preservation comes before taking on possibly armed raving lunatics, the possibility that deep inside they desire to do just what the person who finally snapped and bit back is doing, but for obvious reasons do not take arms against their corporate opressors. Gods know I've long had fantasies about torching down every single corporation who treated me like a slave without even paying my wages, lying and conniving to get me to do all the excremental jobs with a smile.
But expecting office personnel to tackle a rampaging intruder? Don't make laugh. The short while I spent in the life of security work (which was a very brief time, which I'd rather forget, really), I was adviced to call the cops in more major cases, whereas the job for security was to be
visible and escort intoxicated or otherwise irritable induviduals out of the premises. No mention of going John McClane on their arses. You can't expect office staff to consist of ex-marines or hapkido masters who are just all too eager to take down any intruder on corporate premises.
'course, it's easy to say what you would do until you're actually stuck into that situation.
Ditto.