User blog comment:Drayco90/Galaxy Under Siege- The Invasion of Cybertron/@comment-3998231-20120316013403/@comment-143604-20120316022404

Cybertron is in the process of shutting itself down, as this invasion is coming at the end of the Cybertron Civil War, so even if it doesn't want the Reapers arriving any more than it's occupants, it'd be something like a coma victim being aware of an attack, but being unable to fight them back.