I recently had a similar situation...
Had a big office renovation, and everything was hunky-dory until some dweeb complained. A certain executive who always uses a 'bullying nature' via 'name-dropping' and cc'ing higher authorities in their emails, sent 'accusational' emails my way when I stood my ground.
I then replied cc'ing the same people, with a neutral and logical reasoning email that effectively neutralised every point this person brought up, but it also implied indirectly this persons shortcomings.
The silence was deafening... and I was in hysterics..
I just sat there smiling with my feet up on my desk while I sharpened my blade.
