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Now Playing: 11-22-12 Marketplace Tech Report

Today we start with a story of the sock puppet and the politician that should put us all on alert for digital dirty tricks. In Britain -- as in the U.S. -- here is a debate about so-called payday loans: how much is too much to charge, for very short-term lending to people with low incomes. A British member of parliament pushing to cap these fees found herself getting attacked on Twitter. But it's Thanksgiving, so instead of nasty tweets, let's make the world a better place. One Silicon Valley entrepreneur has a plan: he wants startup companies to engage in more philanthropy.