Right! So I do have options! Albeit somewhat limited.
I did hang around outside of my system for some time, as I thought that would be a good idea to catch them before they got in, before I posted my questions, but.....they seemed to come from two different directions, both of which led to a vast array of systems, unfortunately, so I didn't know how to go about narrowing it down, without abandoning my post, which I was sitting at to at least scare off the tiny little groups that showed up every so often.
As for the console command option, if it stops them from cheesing my colony into a hellscape of chaos, I'm all for it, but I'm not the sharpest tool in the shed, so if you could elaborate for me, I'd sincerely appreciate it.
Kinda wish there was an option to approach those Mercenary/Scavenger/Smuggler fleets and pay them for info, if they happened to pass by a system with Pirates or Luddic Path outposts in them, and logged the info as they passed by, as an alternative to the whole...Bar informant option.