[quote=@Nate1008] The Infestation does not use face com, witch means they can talk to someone, knowing who they are, without them knowing who called them. Also, the Infestation will not backstab a nation until they are 100% sure they can annihilate them entirely without any surviving witnesses. [/quote] Again, spooky voices and a mysterious trail of stellar empires and civilizations suddenly going poof do not look good on a diplomatic resume. People don't trust voices they can't put a face to or know the source of and are often regarded as going insane or something similar. Even if you backstab a space faring nation, the very fact that you are their last known major contact before they suddenly disappear will make people suspicious and connect the dots. This is also assuming they're completely isolated and can't contact someone else for help when their allies suddenly turn on them. In addition, space is HUGE, unless you can destroy every ship in space before they can leave the system, there are going to be survivors.