I found this at a local Carl's Jr. which going for breakfast on Sunday March 9th 2008. It reads:
THIS PHONE IS TAPPED
Your conversation is being monitored by the U.S. government courtesy of the US Patriot Act of 2001, Sec 216 of which permits all phone calls to be recorded without a warrant or notification. For more information, visit www.crimethinc.com.

updated 03/09/2008 - israeltorres.org