英国有关加强执行现行规则的试点研究表明能够以高成本效益的方式减少袭击事件，其中收益与成本的比例高达17：1。
In the United Kingdom, a pilot study on stronger enforcement of existing rules showed that assaults could be reduced in a very cost-effective way, with the benefits outweighing the costs by 17 to one.