[brudgers]

Your argument requires one to summarily reject all of Yahoo's claims based on a preexisting ideological stance in regards to software patents.

For the sake of argument, let's assume Facebook is utilizing Yahoo's legitimate and innovative intellectual property. Then it's Facebook which is stifling innovation with IP theft.

In the history of Lockean property rights - from the settlement of North America to file sharing, the first step toward the appropriation of the property of others is invariably to claim that they have no legitimate ownership claim.