Yep. First heard it codified more than 15 years ago when a small Baylor-like university I taught at decided the faculty didn't sit down and eat together enough, so Friday lunch at the cafeteria became "2 Dollar Fried Chicken Lunch for Faculty" and you best believe I was down there meeting my ass off.
One Friday I was at a long table with other language professors and this one dude I didn't know. Well, I was getting paid fried chicken to meet him, so I did. He was head of whatever they called the school's legal department. He and I had a few things in common, had both been MPs in the Army, both had a lizard-like view of human culture. Somehow it moved on to Jesus-Fish. He said he had dealt with innocent and guilty of all religions, but when their testimony began with "I'm a Christian," bam, might as well skip the trial and convict them. Then he said the Jesus-Fish warning that Briskit and I more or less quoted.
I cackled, because I expect low-lifes to act like low-lifes, but the other profs were shaking their heads in distress, the one next to me moaning "Nooo.... nooo..." as if his statement were causing it to happen. He and I were jackasses for thinking it was happening. Probably so. And the rest of that table probably goes to Jesus-Fish businesses as a testimony to their faith.