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Um.. one does indeed have to agree to the GPL in the form of adhering to it's four granted freedoms do they not? If one modifies the code, compiles it distributes the binary and does not provide access to the modified source code they are breaking the agreement to adhere to the GPL. Specifically; infringing copyright by removing permissions which the license requires they pass down to the recipient of the derivitive work.
If what one wants a license inherently agreed to with no limitations then that would be a copy-center type license more like BSD, MIT or the DWTFPL ( http://sam.zoy.org/wtfpl/ ).