I think its funny that anyone is trying to justify it for them. Take a moment and put yourselves in their shoes:

1) You engage the boss, expecting an otherwise normal attempt.
2) At some random percentage, the boss stops behaving as normal.
3) You continue for some short time, expecting the boss to return to normal. At this point it is obviously NOT returning to normal.
4) You make the _conscious decision_ to continue and defeat the encounter.


Point 4 here is where the problem with their thought process lies. They could have just as easily wiped at this point and reported the bug to SE, continuing on as if nothing had happened. Nothing in what was done would require them to _KILL_ the boss. The only reasons you can possibly come up with for completing the kill are 100% self serving. There are zero legitimate reasons you can come up with as to why it would be okay to proceed with a bugged kill in this manner. Just because they are "supposedly" taking the high road and reporting this doesn't negate this fact. The bottom line is that it was done. Maybe they did it, and someone in their FC/LS threatened to report them so they quickly moved into self preservation mode, or maybe they realized that it was possible that their secret got out. Instead, they now have the irreversible damage of access to lore, knowledge, and story that no-one else in the game does, and they are probably crossing their fingers that they get to keep the loot as well. I'm sorry, but I just don't buy this "Good guy guild" mentality.