I sent a Spire scout to scout three plants away from my border. Now I noticed that all three are now alerted, and not only the first one connected to my planets.
Does the Spire scout alert planets it passes by?
I'm whacking my head against a system with a SuperFortress, which I want to get past as it leads to a dead end, so thus eliminating one region where the AI could attack me. But now when those planets are alerted 3 deep, they'll all be reinforced while I whittle away that superfortress. Luckily I have a Cursed Golem helping somewhat.