Ancient Inacive Ackdarian Spaceport: Playing as humans, I've got "we have no code", "will become hostile", "became hostile as expected" etc. - but at the same time the "investigate" prompt, and then, instead of actually becoming hostile it joined my empire.
My military fleet blockading a planet attacked my construction ship approaching the planet for a refuel.
Simply attacking / invading an empire without declaring war completely circumvents any war drawbacks (weariness etc.) plus doesn't trigger defense treaties on their allies. Relationship level with that empire dropped to around -800, still they don't declare war. This has some strange consequences, like being able to buy out all stations in captured territory etc.
Mortakosh: I've disabled and boarded it (at around 7%) in the vicinity of a populated world; The planet automatically startet building it at an insanely slow rate (2.18/s, many years have passed and it's at 25%, 3046s left - which is probably a lie) - and cannot construct anything else (e. g. a spaceport). It's not possible to abort the construction or delegate it to a construction ship.
