MarkTime
You seem to be under the impression the contract holds regardless of local laws, this is not true.
I'll give you an example:
I signed an 11 month contract to rent an apartment in Holland once. This was a rather meaningless contract because after 9 months the law states that the renter can stay permanently. This law overrules that clause of the contract. If the landlord tells me to leave after 11 months I can go tell him to take a jump, irrespective of what I signed.
This also holds for software EULAs. I do not believe that clause has ever been tested in court and in some countries -possibly even the US- it will be overruled.
You also seem to be confusing "breach of contract" with piracy. If I run OS X on a different computer it may well be breach of contract but if I've paid for it it is not piracy since I haven't broken any copyright laws.
