I don't know if this was discussed until now, I've found myself already a couple of times surfing your lists to find out why I do (indirectly) trust this or that user (usually long gone users!).

It's clearly not a feature request, since last time I asked for WO "last week" viewer and I am sad (ashamed) to hear I am the only one using it now and then; so it's up to you if you find it worthy and add it or not.

So, back to the idea: it's not easy to go on the trust "tree" and pinpoint the possible weak links = people who most probably you would not actually trust, but they are trusted (also indirectly) by people added to your trust list. However, if the software knows who are you and who is the culprit, it should not be hard to find the "lines" of interest (not sure though how that could be displayed).