Not that I don't agree with everyone, because I do, but to be the devils advocate:
Shouldn't you be managing your outposts? Isn't finding them part of the challenge of the game?
(don't flame me, I agree with you, i'm just being the opposing view here )
The problem is scanning every outpost, every single turn. On a large map, where the human player has to spam outposts just to keep a parity with the AI, that isn't exactly a lot of fun.
I'd also like to suggest that if I have a unit stationed to guard an outpost, it only makes sense that I'm notified when an enemy comes within reasonable range of it. That range being the size of the outpost's reach. If they're not going to truly guard and take action as needed, why do we call it that?