If you prevent builtin overrides now, you'll break the API. We should start discouraging it, as Mozilla does in its MDN. Maybe some deprecationwarning is a good

If you prevent builtin overrides now, you'll break the API. We should start discouraging it, as Mozilla does in its MDN. Maybe some deprecationwarning is a good point to start with. By the way, Javascript was designed in two weeks. I doubt a lot of thought went into such specific details. And the fact that the language doesn't prevent it doesn't make it a good idea - otherwise I'd claim that UB in C is a good idea.