Template:USERNAME/doc

Adds the username of the registered user viewing the page into the page, so that with the sentences:
 * Hello! It's !

The user reading will always see that the person that you're talking to them, no matter who they are.

'Use this template sparingly. Using it just to be mean to other users may result in a ban.'

How to disable this template
Go to Special:MyPage/common.js, and add the following line at the top, and then refresh your browser - var disableUsernameReplace = true;