San Diego’s Coronado City sands have traditionally borne some of California's wellest-heeled leisurely set, tourists, and retirees, but are now overwrought with a fresh kind of grime, turning once “legendary beaches into a no-go zone,” the Wall Street Journal reports. You’d think San Diego’s premier resort city—and its beaches—would fare better with modern plumbing and refuse solutions, but when your backyard is a very different city in a very different nation, management becomes a tricky matter of politics (and vice versa). “I guess we can’t do that, babe,” Kristin Cohen, a 36-year-old beachgoer and would-be surf-bathing vacationer told her three-and-a-half-year-old daughter Chloe, before turning back for a conciliatory ice pop, Journal reporter Jim Carlton recently reported having overheard.…