It ain't necessarily so
G'day Granev,
"It ain't necessarily so" is the first thought that comes to mind.
Over the years, Dunc had certainly made some very useful posts. He was also quite prolific, thus (as you say) had ended up in the "Top 5" - which is based on the number of posts.
A few months back, Duncan made a rather unworthy post, which led to a short-term ban (a "catch your breath and think about things" kind of thing imposed by Mods).
Since then, his ban was lifted - but he has chosen to edit his Profile to show "Banned" as his member title. Why? Well, only Dunc can say....
In your case, your profile shows "Member" which is a default setting. You can change yours (within limits - e.g. you CAN'T say "Moderator", etc.) to say what you want to say about yourself. Check out other posters titles to get the idea.
You could even choose to say "Banned", like Dunc - although, this might be yet another one for Mods to contemplate and perhaps outlaw (as it tends to give the wrong impression)!!!
Regards,