UBB.threads PHP Forum Software Community Forums Resources and Customizing How Do I? "Hide" a member rather than delete?

On UBBT 7.7.5 you can ban the member. the user profile will only be visible moderators with access, and admins.
You can also use Control Panel > Manage Threads to move all of their topics and/or replies to a forum of your choice, and leave a marker in place that the post was moved. Only members with access to the destination will be able to view its content.