Board Thread:Roleplaying/@comment-1734134-20161203223931/@comment-8397818-20170114222922

Guys, the only ones who know about the existance of the Chaos Gods are their worshippers/servants and the highest ranks of the Imperium's organisations (Space Marines, Inquisiton, Mechanicus, Ministorum, Grey Knights, Astra Telepathica).

There is a very little chance that a criminal or an ex-guardsman could know about that without sucumbing to the tainted knowledge.