Both Time Warner and Topix told the police that multiple people were likely using the IP address, and the information could easily lead them to the wrong house. But, seeing as the cops were dealing with random Internet people lobbing smiley-laced threats online, there was no time for further investigations. It was go time! So, upon arriving at what they assumed was the scene of the crime, they checked for an open WiFi connection and charged right at the one they found ... and ended up scaring the shit out of two innocent women whose only crime was leaving their Internet connection unprotected.
Youtube/Courier & Press | Evansville
They both learned a valuable lesson that day, specifically about how their tax money is spent.
The person they actually wanted was three houses down, likely laughing his ass off right up until the FBI got fed up with the local cops' antics, strolled up, and arrested the guy. This time, no SWAT force was used, presumably because they were arresting some dipshit Internet troll and not storming the heavily armed cocaine headquarters from RoboCop.