"They were born of fear," says Bih Herng-dar, an associate professor of the Graduate Institute of Building and Planning at National Taiwan University, writing that after the 9 / 11 terrorist attacks in the US, countries like the US and the UK launched "zero tolerance for crime" systems in the name of anti-terrorism. One important measure was widespread installation of surveillance cameras.
「形隨恐懼而生，」台大建築與城鄉研究所副教授畢恆達為文指出，美國 911 恐怖攻擊事件之後，英美國家以對抗恐怖主義為名，實行「犯罪零容忍」的警察制度，廣設監視器遂成為重要的手段之一。