Somehow we missed it, but reading about it in TV Guide seemed like we hadn’t. Here is how the magazine described the HBO program, “Mr. Show,” which aired on November 24: “Spoof of `OJ’ trial that finds the Pope eluding officials in the Popemobile and a bloody ring that doesn’t fit.” Perhaps if the nouveau creative types at HBO stopped sipping their cappucino long enough to look up, they might discover that common decency has eluded them.