BROOKLYN, NY: Walt Whitman left, never to return. So, too, did the Dodgers. Marty Markowitz, Brooklyn's Borough President, doesn't want to take any chances with the current residents, so he's doing something about it.Markowitz asked the city's Department of Transportation to place signs at key border points on Brooklyn highways. (At press time, the city planned to install them by week's end.) The signs read simply: "Leaving Brooklyn...Fugheddaboudit." Okay, admits Markowitz, the borough really doesn't have a problem with departing denizens. In fact, it's more popular than ever. "We don't have flight, we've got people moving in," noted Markowitz. "We're experiencing people from all over the country and the world. Our biggest import is Manhattanites moving to Brooklyn. There's no reason to leave. We've got it all." The locals are certainly enthused. "Really cute," one told the New York Daily News. "Marty's so crazy," said another. "He's always thinking about Brooklyn. I love him." This bit of publicity panache has impressed those far beyond the borough's borders as well. Outlets as far as KCNC-TV in Denver and WCCO in Minneapolis covered the story - a result Markowitz, who figured the signs would be good for tourism, likely anticipated. But what if visitors don't get it? No problem, said the confident Markowitz. "They'll ask." The five-foot, eight-inch signs cost $343 each and are being paid for by nonprofit group Best of Brooklyn. They follow in the footsteps of signs created last year to welcome motorists. Those read "Where New York City Begins" and "Not Just A Borough, An Experience." Initial plans have called for the new signs to be installed on the Gowanus Expressway, the Brooklyn-Queens Expressway, and the Belt Parkway. "I hope the signs will bring that Brooklyn attitude across to all New Yorkers," said Markowitz. That remains to be seen. However, when it came time to select our PR Play of the Week, it was pretty much a no-brainer. Fugheddaboudit.