The CGFs on our server (Kujata) do the same things as on others, as I assume. Cure4 hate stealing, MPK etc. But I hear from my friends in other HNMLS, that recently, CGF have magically stolen HNMs at times where claim is not lost. Several people at once, just put down their weapons and receive messages "your target is claimed". My Taiwanese friend received a comment from one of them alluding to a new mob stealing hack - as in it steals while you currently have claim.
Have you seen this?
What do you guys do about this sort of thing?