The FBI’s motto is “Fidelity, Bravery, Integrity.” But given the FBI sting against Raymond “Shrimp Boy” Chow — a convicted felon who was freed from prison in 2003 because the feds got him to testify against a confederate — I suspect that a more apt motto might be “Fuggedaboutit.” On Thursday, San Francisco Chronicle columnists Phil Matier and Andy Ross identified San Francisco Mayor Ed Lee as another public figure who was drawn dangerously close to the FBI’s “Shrimp Boy” trap.