Board Thread:False Info and Speculative Discussion/@comment-24.130.28.230-20150721180826/@comment-4091815-20150723190526

Except that nothing supernatural can pass easily through mountain ash and she can. You want to automatically create an exception to an existing rule when it is completely unnecessary.

Also - the Oni were searching for someone carrying a spiritual parasite.

They checked everybody with even a hint of something extra going on. Stiles was human yet he was their intended target.