Very occasionally I have seen patients be genuinely verbally abusive - intimidating, aggressive, making threats, namecalling, personal attacks, etc. Quite rightly that has been dealt with under the zero tolerance policy.
Often, I see patients who have been treated very, very poorly (instances of neglect, being touched without consent by staff, being spoken to rudely or aggressively or disrespectfully by staff, left in pain, left for days without any update on what is happening to them like they're an item in a warehouse not a human being, having their privacy breached, I could go on...) and are quite justly angry, frustrated, frightened and distressed.
Those patients have every right to express that anger, frustration, fear and distress without staff falsely labelling them "abusive" to further silence them, because it makes staff feel uncomfortable to face the harm they were (hopefully unintentionally) responsible for. Expressing anger or frustration or fear or distress is not abuse. You do a huge disservice to every victim of genuine abuse to make such claims.
Attempting to silence and discredit harmed patients with malicious allegations that they are abusers is an abusive practice and an abusive of power. But that is tolerated. The zero tolerance policy should protect patients from staff too, yet I have never seen patients protected from abuse by staff.
Professionals with a duty of care to human beings who are being mistreated and failed have a duty of care and a responsibility to escalate that - not to be complicit in allowing it to happen by maliciously and falsely labelling those people "abusive" for having been abandoned to try and rectify matters alone. It is a toxic dysfunctional mindset to be seeing all patients as "out to get you".
If you made your points without the vexatious claims of abuse against patients who are simply having normal acceptable reactions to being harmed by our health service, people would be more receptive. Otherwise it makes you seem untrustworthy and not a credible source.