In the past, it was common for players to roleplay as a pacifist race which did not start building any military units until first contact, or sometimes until first hostile contact.
However, since the introduction of Raiders, I have not seen this kind of RP setting very much and it seems almost impossible to pull off as long as Raiders are turned on, since unlike most other threats in the game they can immediately appear in an undefended core system, including Sol itself, and take over once they find no opposition. Even Swarm, Invaders, or extremely hostile NPRs once encountered take some time to survey towards Sol before they can effect a game over, and for spoiler threats the distance at which a threat can materialize can be more or less controlled by the number of systems game rule (which isn't as effective for Raiders since they can spawn into any system immediately).
So, I am wondering if anyone has had success playing a pacifist setting with the Raiders active, or otherwise how people are working around this problem. I imagine the option of playing with a limited military is in play, but that's not what I'm interested in here. So far, the apparent solution seems to be turning Raiders on only once some other (hostile) alien presence is encountered and military buildup is underway, which is a bit gamey but I suppose works fine otherwise.