Best one I got....
I was in a 5" gun on a CV, throwing AA shells towards a furball. Turns out I was throwing long and my shells were landing on the edge of the runway of the base, where I was conveniently killing a/c that were upping...
I was accused in PM of vulching, with all sorts of nasty commentary about my family, my dog, and something involving farm animals that I've pushed to the nether-reaches of my brain. I politely replied back that I wasn't doing it on purpose, and that he should spawn from the other end of the runway next time.
When I landed my kills and he read that it was coming from a ship gun, he actually apologized.
Fortunately, I'm not good enough to be warranted as anything but an easy target, so I don't get PM'd much.
J