what is a law if it cant be enforced?

can our gov possibly enforce this crypto law? --esp over the net? I think what happend is the dod released the net (arpanet/Internet) to the people without looking at the implications that could arise. The people now control the net and not the gov--and they don't like it! anyway our government is ruled by the people for the people--so we should not have any kind of special laws--ones that only apply to the net and not the rest of the world, after all we have a thing called free speech! fsh