I got to [url=http://i.gyazo.com/82dea97abc6d8d88b6f183c0226d83c8.png]this[/url] screen and I finally realized, 'Be Brave' is a warning for anyone about to enter that part of the forum. Bungie knew that things would come to this, and that tensions would be high, and they simply wanted you to prepare your anus before venturing into that hellhole.
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Or it's telling the casual Destinids to prepare their buns for the devastation of their Floodian overlords. *sips tea*