So basically an exact opposite of Intellectual Ventures? The problem with this is that people are still wasting energy, money, and time defending themselves. We need to get to a point where people can do their jobs without having to be paranoid that their going to get slammed with a lawsuit for some obscure and vague patent.
I think patents should be issued on a use it or lose it basis: if you do not make attempts to at least produce or license the product, you should not be allowed to horde it's IP and you it to extort others. Non-practicing entities, aka patent trolls, should be made illegal in general if they aren't making attempts to license their IP.