That looks like the kind of stuff that makes me want to reach for a firearm if used to potential...
On a similar note, the SEMA Action Network posted on another forum about a bill introduced in Hawaii to ban most aftermarket stereo equipment of this nature. It's been deferred, but it's just a matter of time before someone gets pissed off enough about getting vibrated out of their skull that something like this happens for real. I understand that the vast majority of users are considerate enough to keep volumes reasonable when next to other people, but it only takes a few to screw it up for everybody. And you never know who's sitting in the car next to you....
I'm also one of the first to appreciate a clean sounding system.