I've been called a hacker once. I had just joined Right To Rule Donner server and 10 seconds into the game I shot ONE GUY, and he immediately accused me of hacking. All the other people on the server said don't worry, that guy sucks, so he blames the person who killed him of hacking. :O
I get called a hacker all the time. Hugo and Mein Kamphy Chair have nothing on me... except they have way better shots and kill me all the time =D. Actually I have never been called a hacker because most of the time, I'm doing great if my k:d is breaking even =].