Good-Person
Captain Junkie
This is a difficult question. I think it might be hard to interfere in the fight by your member and another member because it's not one's forum. I think i might try to contact any of the admin or staff member of that forum so he or she could resolve the issue.
It does not make sense to interfere or make a decision based on the activity going on other forum. I would not care about what is going on in some other forum.