[Fai's powers had the ability to perfectly mimic body language, mimicry and tone, but it unfortunately came with certain limitations. Such as people with a high resistance and who were expecting it being able to resist it, simply because that part of the glamours strayed into the territory of manipulating what the mind was expecting to see on a level that went further than the merely physical.

Now he stuck out his tongue at Laura for being a spoilsport, flipping over on his back - but still remaining the Vanisher at the moment. That definitely was something no glamour in the world could make up for, no matter how hard he tried.]

Well, of course. No one actually wants dangerous criminals running around. But that doesn't make it any less ridiculous to assume that correlation implies causation, in this or anything else, right?