Is there some kind of exploit where someone might get better rewards in Cube or Boss Rush by kicking one or more players at the end? I have seen two examples recently where someone starts trying to get kicks before the raid even starts. IDK, The last time I was running 1460 Mayhem with all level 7 gems, 4 BIS engravings, and all skills at least level 4. There are better builds but I certainly have no trouble doing Boss Rush or Cube solo. I often do because I work nights. I do way more that my share of damage and there is not much in the way of mechanics in these when you are way over item level.
In both cases I was getting a warning message at the very end of the raid and in both cases the guy was trying to kick or warn multiple players. IDK, It might just be trolling/griefing.