Former Square COO Keith Rabois Has Started A Foursquare-Bashing War On Twitter*

Keith Rabois, former Square COO, prolific angel investor and new partner at venture firm Khosla Ventures, has been bashing another hot tech company, Foursquare, on Twitter this weekend. This prompted Foursquare cofounder Dennis Crowley to take to Twitter, defend his company, and bash Rabois back. And now many of the Valley's biggest names have jumped in to defend Crowley and Foursquare and blast Rabois. It all started when Googler Hunter Walker, product manager for YouTube, innocently tweeted ab...