I wonder, why don't large corporations join forces and lobby the government and congress for changes in patent rules and laws?<p>Of course they themselves may have benefited from the current rules quite a bit too, but they still can benefit more with <i>some</i> changes to the rules that remove the chance for these leeches from sucking blood from them and the whole economy. (For large enough players, growth in the economy as a whole will also affect their growths and profits.)<p>Large corporations generally have both positive and negative impacts on everyone's wellbeing, but these patent trolls, who don't produce anything of value, only consume resources, are clear negatives.