Social networks whose target audience is kids, acknowledge that there may be no foolproof way to block online predators. 那些以儿童为主要消费者的社交网站承认，能完全阻止网络人身侵害的方法也许并不存在。
As governor of Massachusetts, Mitt Romney once proposed a foolproof death penalty law that guaranteed only the guilty could be executed. 美国共和党总统候选人米特·罗姆尼在当麻州州长时曾提起一项死刑法，据说可以万无一失地确保只有真正犯罪的人才被处决。
