If the qualification for enforcement is merely stated as "breaking of the seal" (where seal is the shrinkwrap), then you could tear off a tiny piece of the shrinkwrap on the bottom of the box and then argue that you have broken the seal.
It comes down to what Scott is trying to achieve - a general respect for copyrights, or a strict interpretation and self-enforcement of the EULA. The former I can understand and respect, the latter I find to be tedious and unrewarding.