There are some guilds exploiting Hall of Fame

Good evening
I’m writing this post to inform that, right now, there are guilds paying gold / RMT to exploit a bug where, if you invite a player who is progressing on One Arm Bandit into your guild after the bosses have already been killed, the first kill achievement gets bugged and everyone in the guild receives the Hall of Fame achievement without having to kill Mugzee and Gallywix again.
It would be appreciated if this incident could be investigated.
This significantly simplifies the process of obtaining the achievement, while other guilds that did the progress properly are missing out on it because of the bug.
Regards.

Please do not post exploits on these forums. You can report such issues to us at hacks@blizzard.com. Thank you.