PORT BYRON, N.Y. — Call it a lesson learned. Michael Kocur, 39, admitted in court he was drunk when he was stopped by police on an upstate New York road last July. It is Kocur's fifth drunken-driving conviction. Kocur, of Port Byron, near Syracuse, told Cayuga County Court Judge Peter E. Corning he drove the mower and towed a friend in an attached wagon as the pair picked up trash along the roadside. "Which goes to prove," Corning told Kocur, "that no good deed goes unpunished."