PHILADELPHIA. Tailgating before a Phillies game is not a good idea for anyone wearing a Mets jersey and a Mets cap, as I found out Saturday afternoon treading into the maroon abyss in blue and orange.Fans were less obnoxious inside Citizens Bank Park, but I attributed that to the 10-0 shellacking the Phillies gave the Mets. Few fights occurred in and around our seats in section 309. Perhaps having a Phillies fan with me kept me from too much torment. The heckling itself was tolerable, even fun, when it came from by a bachelorette party from Torresdale.But outside the gates prior to the game, with the bad taste of Friday's 9-1 loss to the Mets still fresh in their dirty mouths, those inside Lot K enjoyed the chance I gave them to use a month's worth of expletives in one or two sentences."Go back to New York, you a—hole," said one rather unoriginal female tailgater, who I decided not to correct by adding that I'm actually from northern New Jersey. "Get the f— out of here."Other Mets fans who showed up — and there was a good amount — all seemed accustomed to the inhospitable confines of CBP."People are not nice to us," New Jersey school teacher Stacy Socha said standing behind Section 133 with her friend Katie Hughes, a Childrens' Hospital nurse. "They can be pretty bad."