Almost as soon as it starts hitting the outlying outposts, the counters start popping up. The AI defenders seem to be unnaturally aware of what it's attempting, and make moves to counter them , faster and more accurately each time. In addition, the drone presence in the air is getting denser and more persistent; eventually, one is likely going to spot Reaper, especially if they start using quality cloaking techniques, as opposed to openly flying through the air.<br/><br/>Maybe they already had?