People tend to forget that websites are just documents. Especially those who are not deeply familiar with the web technology. So, to those who are not aware, I'd like to add: web is nothing more than a protocol in which a user requests a document, and a server generates and returns a text response. It is up to the user what they will do with this text response. For example, they may open it in a browser which parses special tags and turns it into a nice visual page. They also can choose to open it in a browser which cherry-picks which tags to parse and which tags not to parse. They can also just read it as an unparsed text. This is simply how web was designed.