1. It's nothing special...and the dance moves actually look pretty lame, but it is fun to dance on someone's corpse. 2. It was actually is a clever ting to do. 3. Crouching to remove your constant detection of radar is not an exploit. It's an actual game mechanic. It's designed to allow you to perform brief sneak attacks as well as confuse your enemy if they're doing nothing but looking at their radar. Entering third-person in a competitive FPS can be considered an exploit, but is basically just an oversight of the Devs...as with most issues in Destiny. A simple fix is just to make a player lock into the dance animation if they use it for 2-3 seconds. That way there is a risk/reward for people who may try to use such a tactic.