An old one that has already been /.ed but worth repeating! Register reports: 

Oklahoma city threatens to call FBI over 'renegade' Linux maker
By Ashlee Vance in Mountain View

The heartland turned vicious this week when an Oklahoma town threatened to call in the FBI because its web site was hacked by Linux maker Cent OS. Problem is CentOS didn't hack Tuttle's web site at all. The city's hosting provider had simply botched a web server.

This tale kicked off yesterday when Tuttle's city manager Jerry Taylor fired off an angry message to the CentOS staff. Taylor had popped onto the city's web site and found the standard Apache server configuration boilerplate that appears with a new web server installation. Taylor seemed to confuse this with a potential hack attack on the bustling town's IT infrastructure.
"Who gave you permission to invade my website and block me and anyone else from accessing it???," Taylor wrote to CentOS. "Please remove your software immediately before I report it to government officials!! I am the City Manager of Tuttle, Oklahoma."

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Read more at the link above (click on quoted article title) and also see the entire email exchange and Register's followup article. If you haven't seen it already, click the link… its absolutely worth it!