Written By Kanishk Singh :
Do you wanna learn how to Comment,Post blank on Facebook.? Then you must read this Doc.
While Posting,Commenting or Chatting,Press this key Combination--->
Press and hold ALT+0173. and Hit enter.
You'll Notice that after pressing enter there will be no word on the post/the post will be blank.
What is this code?
Your computer then substitutes a (normally) undisplayed soft hyphen, Unicode character U+00AD.
This is a common trick used on the internets for many purposes, such as bypassing wordfilters, to maintain forced anon by choice after
The Great Re/b/oot (the character would make the name display a blank name rather than "Anonymous"),
and to post using moot's tripcode without getting b&.
Special Credits To Kanishk Singh