Summer has officially begun and for many, it's time for sun, sand and swimming. But don't count on lighting up a cigarette while you're at the beach. Over the last few years, you may have noticed more "no smoking" signs have cropped up on parks and beaches. They're part of a larger trend banning smoking at outside, public areas. In fact, smoking has been banned in 843 parks and more than 150 beaches in the last two decades. What beachgoers probably aren't thinking about is the ethics behind these bans, which began taking hold in the early 1990s. Public health...