Sometimes, New Jersey offers Pennsylvanians the unthinkable, something so fine it feels naughty. Such as selling beer, wine, and liquor under one roof. And it is naughty - illegal, in fact - for Keystone State residents to drive back over the bridge, trunks rattling with bottles of booty purchased in New Jersey. Yet they do it. For all the sprucing-up of Pennsylvania's State Store system in recent years, many customers still cast a kind of personal vote against that system by shopping across the river.