To help you understand, it's bad juju. Even saying our names can be a problem. [She settles back and stares vaguely window-ward.]
It hasn't caused trouble so far, and the way the wardens act makes us both wonder if they think themselves above it. Whether they're right or simply overconfident, the secrecy is important.
And, more selfishly... I don't think anyone would want to be around me if they knew. Especially right away.