Web Ads with Sound?

Mina asks: "Just noticed that some sites, About.com in particular, started piping sound adds in their pages - one in particular (the Harry Potter themed CocaCola subsidized reading campaign from Reading is Fundamental). This isn't something that can easily be turned off - unlike popups, they can't just be clicked on or elminated by a nifty browser plugin. I'm interested in seeing how the Slashdot community deals with the new, more annoying ads that the more desperate companies are implementing now. Do you just live with them? Are there even niftier plugins to the browsers that I'm just not aware of?" And you thought pop-ups were the worst, now you can get sudden and annoying sounds played as well. Maybe browsers will have volume sliders bundled with them in the near future. God, I hope not, but if such ads become commonplace, it may be a good idea.