Some of things the serial bully gets up to:
This is from Tim Field's web site.
The serial bully appears to lack insight into his or her behaviour and seems to be oblivious to the crassness and inappropriateness thereof; however, it is more likely that the bully knows what they are doing but elects to switch off the moral and ethical considerations by which normal people are bound. If the bully knows what they are doing, they are responsible for their behaviour and thus liable for its consequences to other people. If the bully doesn't know what they are doing, they should be suspended from duty on the grounds of diminished responsibility and the provisions of the Mental Health Act should apply.