Unforunately, UpdateMedia would find the file again.
What needs to happen, is that logic needs to be added to MythTV_PlugIn to trigger deletes via the mythtv control port.
We as always are looking for patches, if we don't get to it first.
Wouldn't it then treat it like every other live tv recording, and not show it in the list of videos? I often see shows I watch show up in the video list, then shortly disappear. The only videos that stay in the list are the ones that I record, and are processed with /usr/pluto/bin/SaveMythRecording.sh.