Back to the Junkers - I think the ONLY legit reason for their existence is existence of House Intel factions, which instead of destroying Junkers, they get some info for money about unlawfuls and other houses.
Also, why Junkers are in house space then? Corruption and delicate politics regarding unlawfuls. I say, caps around Junker bases is very ooRP and should not happen. Someone pointed me out that some unlawful bases fit the surroundings - for example, Montezuma or Buffalo, which are a big rock and lawfuls should not know about that base - vessel in question simply "disappears in the thick asteroid field".
This however gave the me quite neat idea at the moment. Maybe in order to fend off capitals from Rochester, let's simply make the scrap field behind Manhattan a very dense one?