Actually I have had the need for this feature for a long time.
Suppose you need to prevent changes on ONE table while you are doing some maintenance work in a Db.
To Set a DB in read-only mode is too drastic, To Setup that table in a separated File and make it read only is inconvenient.
To setup INSTEAD OF/AFTER TRIGGERS is expensive in Server resources.
This solution seems cheap and Fast 😉
* Noel