The other thing they can do and they don't mention this in big bold letters. It allows a person from you're ISP on they're own if they see overwhelming warnings sent to that account. They can give your name out to a company and then they can sue you for damages. I read a kid who pirated songs from the internet. He was loaded with hundred of thousands of dollars in fines.
In my viewpoint. Everything has to a Start. The cold war didn't start over night. It was slowly built up along the system then over time it consumed nearly everyone and destroyed land, life's etc. The point I'm trying to make it even though it's virtually just "decreasing the speed" it opens the gate ways for you to be sued. Forget about online privacy if you're downloading pirated stuff.
It also invokes an interesting question about the limits the people will allow them messing with our ISP. Sure some people may say it's a tad over blown with the thread title. Breaking your internet isn't that what it's doing if you can hardly connect online. I know comcast has been known to shut down services for a day if they even suspect a user is using spam on they're internet.