The following is a public service announcement: The next time you steal a Red Sox's castoffs, particularly their sweaty cups, eBay would rather you sell them elsewhere. The Track Girls are spreading the word that SportsWorld, in Saugus, tried to sell Jonathan Papelbon and Kevin Youkilis' used jocks on their eBay store. Judging from how many times the Track Girls have written about SportsWorld and its Red Sox underwear sale, SportsWorld has been trying......