Smoking sports fans beware, Shea Stadium is cracking down on the nicotine set this season. While the Smoke-Free Air Act has been in effect for 13 years, security at the stadium has turned a blind eye to those lighting up -- but that's all changing. The Observer reports on one fan's encounter with the new guard:“A security guard told me I can’t smoke and then ripped off a piece of my ticket,” the 26-year-old fan......