Quote Originally Posted by JackPhoenix View Post
Another way to stop magical infiltrations is equipment. Bards and wizards aren't proficient in medium armor and shields, which means they can't cast spells while using them, and if they only predent they have them, it's easily disproven: Disguise Self is not physical change, so something like hitting your shield with your weapon would be impossible to fake. Wearing armor all day has a long tradition in D&D.
That seems like a stretch. What's to prevent them from making the proper noise some other way?