What happens to outposts built with the Pioneer when the player who created them is logged out of the game?
TL;DRPioneer-built outposts and their contents persist while the owner is offline and can be attacked and looted, with AI response depending on location and travel time, so players are encouraged to add their own defenses.
Let's just say this direct and up front for those of you who worry about these things: Yes, the outpost and their contents are persistent, so they can be attacked and looted. Offline security will have a lot to do with your "neighborhood", just as you would depend on local authorities to varying degrees to protect your house, apartment, trailer, etc. in real life when you are not home. Among other things, that means that while other actors in the game universe, including local law enforcement, militia, UEE, or whoever else is tasked with general security in that region, will react to attacks on privately-held outposts, it will depend on AI location and travel time to outpost. Sometimes there will be a quick response and other times it will be delayed, so the players are highly encouraged to protect their outpost/investment by placing defenses and hiring personal security. The less hospitable an area in which you set up your outpost, the more responsibility you will have for your own safety.