... and then popup blockers were invented.
Which is a good point -- advertisers abused a privilege (ability to open a window), and internet users adapted, their business model adapted, and they survived it just fine.
The same thing needs to happen again. I really feel it's the advertisers/websites that have once again abused a privilege. If they can't make money, they should look at themselves. No one signs up for internet service to check out the latest ad blockers. Users install them because they have to (just like why they installed popup blockers).
Long story short, it uses HTML5 and flash exploits to put a hundred popups of various porn shock images alongside blaring over the speakers "HEY EVERYBODY IM LOOKING AT GAY PORN"
Unless you: ban flash, ban popups, and ban Java; you are going to have a bad time, and necessitate in rebooting to get it to stop.
I consider it a good tool to check for client browser hardening. Just beware, if you do search for it, it's absolutely NSFW. (Will not provide links)