I would suggest a Rank: "Banned". One word, right under the username. It can even be a warning for other people.
Excellent.
This may actually be a good idea. I'll check with theymos to see what he thinks.
This has actually been suggested before,
It was shot down by badbear.
I think there is only this log :
https://bitcointalk.org/modlog.php , but as you told only the last ~24h of action will appear in that log. Maybe when an user is banned I think it easy to theymos add under the "rank coins" a little word: "
Banned" ,
What do you think ?