you havn't been clear about your question, however, if the carpark was manned by a parking warden the woman should have been dealt with by them, you have committed an offence I am sure by moving her car, you may well have caused damage to it, or could be implicated in the event of any damage being declared. If the car park is covered by CCTV the woman may have made a complaint against you and the number of your vehicle may have been given to the police. Two wrongs never make a right and any situation like this can leave a person open to all sorts of criticism and potential legal action. I would never presume I had the right over a car parking space, life is just not worth the hassle, I would move on and wait patiently, in the time it took u to commandeer the passer by, who must have been incredibly gullible to offer to participate, another space should have come up, disabled or not.