The forum needs a hide/show button. its usefull for plugins that want a changelog in their thread.
EDIT:
I think this plugin does what i hope it does http://mods.mybb.com/view/hide-tags-bbcode-xtrsyz
EDIT:
I think this plugin does what i hope it does http://mods.mybb.com/view/hide-tags-bbcode-xtrsyz