Computer Misuse Act 1990
It'll be interesting to see if they try that in the UK. Sections 1 and 3 of the Computer Misuse Act lay out the penalties for unauthorised access to a computer. I'm pretty sure a click-through EULA won't trump those.
Interestingly, section 3A of the above Act makes it an offence to make, adapt, or supply any article intending it to be used in the commission of an offence under sections 1 or 3. That would make the creation of the Win8 store a criminal offence...
Nothing will happen, of course - because these laws are only ever enforced against individuals, never against anyone who might make any sort of political contribution...
Vic.