Edit your post on the app by tapping the three dots to the right after tapping your post. This will give you a menu, which holds the edit feature. Remove #Gaming from the tags. #Destiny or #Clans will suit your needs better, and prevent #Gaming from getting clogged with Destiny threads. And no, Destiny threads do not belong in #Gaming even though Destiny is a game. Destiny threads belong in #Destiny because Destiny is Destiny.