I wouldn't go antagonizing orcs; even the lowliest peon orc in DD is worth more XP than a human soldier, and the elite troops are worth a crapload. I got bored wiping out the mind controlled soldiers; they were like experience point popcorn -- sure they were easy to eat, but they weren't very filling, and after a while, you just got tired of 'em.
If you want a cheap laugh, get a few shadow potions, lure a giant heavy orc into Mitox's camp or the barracks, and then go invisible. All of the guards following your bruiser buddy will go down like wheat in front of a thresher. No wonder they needed you to go blow up their supply train and poison the well; if you had refused, the entire human army would have been slaughtered by the first orc they encountered! <img src="/ubbthreads/images/graemlins/laugh.gif" alt="" />
Oh, and we should all be grateful the Imps moved to the wastelands. They could easily slaughter us with a thought.