I hear what you're saying.
I have had a couple cases, though, where the patient explains that shortly after they were placed in a cell, the thought of them not being able to get out caused them to enter a psychotic rage. Now of course the term here 'delirium' is a misnomer and I think you're right...this is due to underlying axis I or character pathology.
Just curious. In the example you gave about the man who tore the gurney railings off....are you in support of this type of person have police involvement and assualt charges brought against them? This is assuming no other non-substance use Axis I disorder exists.
Working in NYC, I too have seen lots of stuff like this, and can't help but think that simply that because someone was fortunate enough to have been brought in by ambulance instead of to a holding cell after being subdued, they will detox and more than likely have no long-term consequences for their abuses and assaultive behavior.