Oh, if it's about allowing Fmods to view users' IPs, then that's understandable. But I find it a stretch to arrive at that conclusion from reading the thread idea.
It was a slight tangent that the thread went on, which I allowed. However, it is related to the topic at hand, as that could have been a viable solution. We now know it is not a feasible solution due to conflicting with real world laws.
I am of course open to other ways to approach the problem at hand, which I believe I've explained well enough at this point. I don't think there's any more simplistic of a solution than simply providing a list view-able by fmods confirming certain suspected accounts as being linked though.My Suggestions:
Cross Minigame Reward Shop - waiting since December 26th 2013
Spelunking - non-combat raids