Or a lot of the times when a website is compromised and you're able to steal someone's usernames and passwords, very often are the result of simple little things like this.

很多时候，当要访问的网站被人破坏了,你就有机会窃取别人的账号,和密码，正是因为这样或那样的小疏忽存在,才会导致这种事情频频发生。

计算机科学课程节选 : 哈佛公开课