2
- create a new group called 'banned' or whatever you like.
- create a new block and call it 'banned' or whatever you like. Enter whatever message or info you'd like your banned members to see.
- set the permissions of the banned group to only see the newly created 'banned' block.
- edit users and set the offending individual into the banned group.
thats the easiest way, unless you want to ban the specific IP.
Happy Xoopsing!