I'd find it hilarious if inputting /dance as a Space Marine did nothing but bring up a message stating "The Codex Astartes does not support these actions."
You don't need a dedicated dance function as long as you can jump, walk, and crouch. Those are all you need to make it appear you are dancing with the right skills. The only thing that should require a victory dance is if they put a Baneblade in the game. @Lampo: If they did that, people would spam it on the vox frequencies and no one would get anywhere. Most of us would become so annoyed that we would make Khornate Berserkers listening to Slaanesh music look like the Emperor on holiday.
Say NO to dancing Say YES YES YES to elaborate taunting gestures!!! And if an Eldar taunt gesture happens to look like a dance to fulfill their elfyness... then so be it... But my muhreens better not have hip movements... or any other such silliness.
Is this really even a topic for discussion? Seems a bit absurd anyone would even consider the thought, much less express those thoughts openly. There's no dancing in the 40K universe, just like there's no crying in baseball.....