Okay if you are logged in as a admin. then you should be able to delete any post.
For example when viewing a post just select the edit button in the post and follow the directions.
For banning a member it would be from the UBB control panel.
Which is by ip.
Control Panel » Member Management then select the ban list tab.
Or you can just edit a member per instance and ban them one at a time.
I guess the real question is what are you attempting to do.
