Foursquare co-founder Dennis Crowley thinks a reckoning is coming over data privacy

A decade after location services company Foursquare first launched at the SXSW festival in Austin, co-founder Dennis Crowley is back at this year’s conference with a message for the rest of Silicon Valley: beware Washington, because the tide is starting to turn against widespread, unethical data collection.
Crowley yesterday announced an Austin-specific demo of an experimental anonymized location-tracking feature for Foursquare called hypertrending. Today, in an early morning SXSW talk, C