Have you thought about adding some sort of privileges that come along with it? Nothing too amazing, but how about something like a bigger personal text or the ability to have a clickable link there? I've always thought that would be useful. Maybe a custom title? Editable or not. I think with having some sort of added benefits it would help the forum by encouraging users to report and everyone benefits.
Non staff can't see a users banned status, correct? Is there a reason for that? Perhaps one "privilege" for a large number of reports could be the ability to see banned user status?
I remember having to check the modlog to see and it was a little annoying!
Edit:
I suspect that it will always be difficult to know what any mushroom cloud icon is if you don't already know, though.
How about we call it the red tree of peace! Hell even make it "rasta" coloured and just call it the tree of peace! It will be our little secret!
Good job everyone, looking forward to the implementation!