I grew up with guns and am very lucky my parents were responsible owners; otherwise my 17-year-old blood would have been all over the living room one whacked-out night when a friend picked up a rifle, only to be thwarted by the empty chambers (or whatever the word is). So I really wonder why America’s Most Overrated Coffee Chain won’t keep the people-killers out. After all, what could possibly go wrong? Caffeine is the drug that insures you can’t shoot straight.