Was Patched!?
The Kronos spawning in Sirens that one time was an exploit so a villain or two could get the badge, and it did nark off a number of players in the zone :P
Not sure if they're removed this possibility, though i doubt it, but any villain with this badge might just have it removed in a later patch, who knows.
I doubt it. Pretty sure that when questioned in the past, badges awarded aren't subject to removal. I can't point you to the exact source however. I presume there's some sort of massive datamining reason. However why on earth should a villain have Master Of Olympus removed if they have indeed defeated Kronos?
If the bugs been patched, shame. Doing that badge was one of the most fun, exciting & rewarding things I've done in game.
And people get narked off about it? Wow. Whatever the cause, something very very rare & very out of the ordinary happens & people begrudge it.
When we did it, everyone there was beside themselves with surprise & enjoyed the spectacle of it. Those that didn't want debt from the beast stayed & watched for the few minutes it took to beat him from a safe distance. Others joined the team & helped out. It made for one of the more memorable events in Sirens 
.
Anyone aware of any attempts to do this badge?