Support for the decision by Penn State trustees to fire the late Joe Paterno is falling, according to a national poll released Thursday. The Seton Hall Sports Poll indicated that 42 percent of respondents support the football coach's firing, down from 55 percent in November. Forty percent said he should have been allowed to retire after decades as coach, up from 31 percent in November. Nearly two-thirds said Paterno's legacy has been tarnished, while about 18 percent did not think so.