I wonder if copyright holders will file a lot more of these notices (100X? 1000X?) since they will presumably be cheaper and seen as less threatening.
If your ISP actually cuts off your internet after 6 false accusations, you might want to take them to the courts. EFF will probably love to take on such a suit. Unfortunately, very few people have the financial means or guts to sue the RIAA/MPAA and follow through with it.