The old trade-Guild stations, (Tradestations Alpha Beta Gamma Delta, Eta) are all invulnerable.
I can drop their shields, but cannot actually damage any of their blocks.
This seems to be related to the old Trade Guild being a faction, and all of their stuff being treated as a homebase. (presumably to protect rod-shops and people docked to rod-shops.)
Unlike a rod-shop, I can shoot these stations infinetely, and a defence fleet is never summoned. (hit a rod-shop 5 times in about 30 seconds, and a fleet gets called)
This is NOT about the new "traders" faction, nor is it about their bases, so please don't ask about them.