That's kind of scary to see in the TOS of such a service provider. Under the US law, that more or less gives the company full access to be able to snitch you out whenever they feel like it for any reason, since at this day and age, all it takes in the USA for such things to become a matter of a "legal investigation" is to make an accusation (regardless of its validity) that you're engaging in such activity. At that point, it's pretty much guilty until proven innocent, and you must prove that you have NOT done what you've been accused of. While I agree with the principles that the DMCA was supposed to promote, I simply cannot condone any act that promotes guilty until proven innocent.