Nonsense. Mints are not a 'grey area'. The rules clearly state that the ball cannot be polished with any artificial substance. Both Marcus Trescothik and Paneser have admitted to the 05' team using mints (an artificial substance that is not naturally contained in saliva) to manage the ball. Both concealed their use of the mints from umpires. They did so because it's outside the law. Paneser also admitted to using his zip, which is also ball tampering. I note you fail to address Atherton, which is entirely unsurprising. It's possible you actually believe he was just keeping his hands dry.
All international teams have ball tampered at some point. That's how you get reverse swing. It seems only the English are hypocritical enough to view their ball tempering as somehow different, somehow a 'grey area', and everyone else's as condemnable. Again, not at all surprising. Enjoy that high horse. Don't fall off, now.
This is just going around in circles, but until they ban players having anything to eat during games then mints are not illegal. How do we know Finch's chewie doesn't affect his saliva and therefore tampering with the ball?