Thanks, Fred. I see there are some that weren't around, the last I saw any Columbo T-shirts ("Yes, every man has a motive"...."Excuse me, sir, I was trying to be inconspicuous"...."Can I ask you a personal question?"). I have one that I occasionally wear to the gym, "What would Columbo do?"
They should use one of those many lines where he's asking someone's permission to light his cigar. A novelty shirt like that could smooth things over SLIGHTLY between cigar smokers and non-smokers.