One could not fabricate a better piece of evidence that we are wrongly managing the disclosures, patenting, and marketing of university technology. Supreme Court, are you listening?
It is super easy to spot the overtly "bad" academic inventors: no funding, no data, surly disposition, body odor, etc. Even a brand new technology commercialization professional can spot these jokers their first week on the job.
The overtly bad inventor is also great because no one blames you for not working with him/her. Their chairperson things that he/she is a mediocre scientist --- a true "hiring mistake" --- and wishes they would go away. And, you don't have to worry about them complaining to the upper university administration because they hate the guy/gal too.
Even though you won't have any creative control, you should protect their idea because (a) it is a good idea and (b) a technology commercialization person has never lost their job for patenting inventions from well-regarded faculty members who publish is great journals.