Returning ploneformgen errors back to restricted users

Question

I have a ploneformgen form that we use for event creation. It's necessary... trust me. The users using the form have local roles for adding content (through the sharing tab) and are not admin users. The form carries the permissions to process the event. Invariably my users do something that throws a system error (event with the same name, paste an illegal character in the title, etc). It would be handy if my users could see the traceback, but I'm unsure how to enable that or if it's even possible? Any hints?