* Patent troll: If you’re using WiFi, you’re infringing

* Andrew Ross Sorkin: The Wall Street protest matures

* Call the Colonel: KFC forced to pay taxes in Iowa, where it has no employees

* Morning Call: U.S. futures point lower, London sheds 2.3%, European shares tumble and the Nikkei slides.

* Peter Thiel: The end of the future

* Joe Hagan: Will Twitter become profitable?

* Thomas Geoghegan: What would Keynes do?

* Jim Cramer: This isn’t 2008, and we’re not Europe

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* Henry Blodget: When’s Obama going to start freaking out over bank stocks?

* The Economist: “If it weren’t for the politicians, the economy would have a fighting chance.”

* Tweet of the Day: @kaylatausche A friend on real-life M&A: “i’ve been the victim of a reverse-merger, which involves new co. buying us pizza and champagne for lunch today”