如何检查是否有人修改了HTML(使用Firebug之类的东西)?

Is there an easy way to check to see if someone has modified your HTML? I am currently writing some code that takes data from the DOM and submits it to the backend where it will of course be sanitized and checked for accuracy, but I was wondering if there was a way to kind of head that off at the pass.Is there an easy way to check to see if someone