[tbworld]

It would be much easier to prune threads by 'User name'. Otherwise, you could possibly use the code from the prune routine with the 'Banned' username/ID. Take a look at code 'admincp/thread.php' ...

If you are not a programmer you could simply insert a call at the end of the 'ban' routine, to the prune routine.

admincp/thread.php?do=prune

Unfortunately, showing you how to do this, is beyond the scope of a simple discussion and my time. You might want to request this in the paid/unpaid request forums.

If you decide to do the code yourself, show your code, and I can be of more assistance.