That would only be the case if someone does it by logging in to your iCloud account, which applies to none of these attack scenarios. Even then, it only notifies the owner of that account, not the party who is sending messages to unverified keys.

If you're spoofing the keyserver, it's invisible to Apple. If you're the FBI and serving a warrant on Apple, Apple does not send the message telling you that "FBI's MacBook Pro has logged in to your iCloud Account."