Mike is above our law no matter what you say or do.
This has never come up, and it would certainly place me in an awkward position if it ever did. Much like Boris Johnson lying to the Queen, it would precipitate a constitutional crisis. But I would certainly be willing to temp-ban Mike for a few days if it were required. If he prevented me from taking such an action, I would resign in protest, and publicly state precisely why I resigned.
Unfortunately, anything other than 1-5 day temp bans would be out of the question, just because site maintenance would need to be done, and Mike would need to be online to do that. But there would/should still be some consequence, and no user, however high up on the food chain, should be totally immune from punishment.
But, happily, I trust Mike not to put me in that kind of situation, and he has so far done as good a job as any at following site rules and standards.