I thought along the lines of those technologies that you can aquire through ruins or salvaging anyway. All swarm technology falls outside of that category, I think.
To be more specific, I was looking for compressed fuel storages, absorption shields and advanced particle beam technologies, all of which the player can legally aquire. I wouldn't know of any bugs with these techs, but I seldom get to use them either. For a campaign I want to disable all spoiler races and manually control abstracts of them.