WESTERLY — A patrolman knocked on Mary Patrick’s Misquamicut door the other day. A neighbor had reported seeing her apparently menacing license plates in the driveway.Having New York tags is all it takes now to draw the authorities.The officer “was very nice about it,” said Patrick on Friday from the driveway of her family’s summer home. The small Cape has been in the family for about 17 years. “He said a neighbor had called and said we just moved back in,