Good idea! I would definitely use this. If you did something like when object is cloned: destroy, would that destroy all clones and the original object?
You can, right now putting that in a custom block is the best way to do this, but it would be much easier if it was its own block that would always be in the same place.
That it would be better to broadcast a message to get the object to destroy itself. But a version of the destroy block that can’t destroy the original object would be useful if you need the original object to recreate the clones at a later time.