They reject the new property because it threatens their absolute control of the old. My high-speed modem is mine, so your intellectual property must be mine too. If I really own my modem, then I must have an unqualified right to dial up anywhere, any time, and suck in whatever is out there to be sucked. Copyright law in cyberspace offends because it limits what I can do in physical space. Encryption is OK because its authority is created in my very own machine.
Property is politically neutral.
Sure, property is the capitalist's tool. But the feminist's, too. And the libertarian's. The woman who wants an abortion says it's her uterus, not Pat Robertson's. The rancher says it's his land, not the government-protected wolf's.