http://www.pennlive.com/midstate/index.ssf/2012/11/pennsylvania_has_250-300_polli.html#incart_river_default
He said officials are concerned that releasing a list might mislead voters. "There is concern this list is so fluid, and some places have generators (we don't know all of those by any means) that it may not even be completely accurate," Ruman said.
Uh huh...or might actually encourage people (esp. Democrats) to...you know...go to the correct place to vote.
Surprising they're not suggesting Democrats should vote on November 7th to help 'alleviate' the 'expected stress' on the system.