I all for it Lauda.
I think members should also be able to see who is and is not banned, past, present and future.
There is really
almost no valid reason for one to sell their account here. Even if they were desperate for money, then the best thing to do would be to put it in as collateral for a loan.
It is hard, or a waste of time, to investigate/report/watch when we do not know if an account is already banned.
Maybe mark their profile page? This should be easy to achieve?
I'm not sure about that, nor what other moderators/administrators think. Currently, banned users get stripped of their signature and other profile information (implemented sometime in 2016 IIRC).