Re: Client support, we've heard about it
In a previous job, a lecturer stormed into my office, dragged me into a lab and tore me a new orifice in front of his students, because he claimed the PC's I installed were crap and buggy.
Seems he was trying to teach final-year Informatics students Visual Basic (!), and was having problems that were caused by his own incompetence with VB.
I handled that situation in a way that he didn't bargain for.
He expected me to justify myself and apologise to his students.
I just took over his class for a bit and answered questions from the students, while he sat at a desk fuming.
Sure, I had a good case for assault, and I could have raised a case with HR, but I figured the student feedback at the end of the module would sting a whole lot more.
"The sysadmin guy taught us more about VB in fifteen minutes than the lecturer managed in a term" was particularly satisfying.
Revenge is a dish best served on something they can't smack you over the head with.