McGill Application Being Revoked

Does anyone know anyone who had their McGill application revoked because their average dropped? And how much can my top 5 average drop?

It’s so rare I wonder if it has ever happened, except in the case of somebody who didn’t actually fulfill graduation requirements.

I’ve seen this inquiry before and it’s a legitimate question. So I would say if you applied with a 4.0 but graduated with a 3.0 there might be an issue? Let’s just say it would take a precipitous drop.