I must confess that it's probably been two decades since I've done any Christmas shopping for kids. So I was a bit taken aback when I visited ShopKo last week - searching for an action toy for my 4-year-old grandson - and happened upon a black soft air rifle that fires plastic BBs and bears a striking resemblance to an assault weapon. Yes, the same kind of assault weapon that gangs have used to gun down police. (Actually, it wasn't a total surprise: Several weeks earlier, a reader had called and suggested I check out some of the sophisticated fake...