They could overstress the processor, but that would only work for people that don't know what they are doing. But obviously, there are plenty of them out there. Only other thing would be some kind of virus, but with the advanced virus protection, most scanners would catch it when it started deleting files. I really don't think we have much to worry about here. Even if the government goes through with it, they'll spend milliions to write the software, and within 1 week, a group of 14 year olds will have written a blocker for it.