From the "Code of Conduct" that ZOS say has to be observed, a breach of which can incur a permaban for the game account:
"5.2 Users will not exploit any bug, or abuse any game system (such as the scoring or award systems) in a ZeniMax Game, Service, forum, or other games or services provided by ZeniMax. Users will not intentionally use or share any bug found within any ZeniMax Game, real or fictitious, regardless of whether or not it grants an unfair advantage. You will not directly or indirectly communicate the existence of any such bug to any other user of the ZeniMax Service (in game or on a ZeniMax service). Report bugs and exploits using the in-game portal or via
http://help.elderscrollsonline.com/app/home."
The last sentence makes it clear that "any bug" isn't solely referring to 'bugs' that normal people would recognise as 'exploits'.
@ZOS, are you seriously intending to say what this clause actually says, because right now there are several threads where several posters are in breach of this, not least the 2H damage thread.