I second this. Some of the videos are actually pretty good, but they've made me jump out of my chair a couple of times. If they would just not auto-start, or be so loud, I wouldn't mind them.
Epic TV says they're working on it. If you do see one with sound, it would help them narrow it down if you could click it and post the URL you land on. Then I'll be able to tell them which companies' ads have sound.