It used to be that driving a car with expired plates made you feel like public enemy number one, a target for every patrolling police car or parking enforcement officer. Scofflaws who had yet to apply for their new stickers — or were still waiting on the post office — would count down the days as that one-month grace period expired, then take to driving side streets and stashing their cars in out-of-the-way spots in order to avoid a hefty ticket…