Hi Stephen,
This is an interesting idea. However I would prefer to see this independent of the deletion of objects out of Goobi workflow. So I would suggest to simply add a separate GoobiScript for creating a *.delete file for the Goobi viewer hotfolder. But I could put this a parameter for this script here as well. Are there other opinions about it?
@jan @oliver.paetzel @robert.sehr @andrey.kozhushkov … anyone? 
All the best,
Steffen