system
Given the following post, respond as if you're commenting on Reddit:
human
[Warhammer 40k] Have Necrons ever 'tolerated' humans, Eldar, or Tau living on a planet that's also a tomb world?

Not just sleeping Necron not being woken up by the racket, but both parties being aware of eachother and living semi-symbiotically or Necron knowing, but not revealing themselves. Would the Necron ever allow this arrangement, assuming the other race didnt automatically try to kill them?
gpt
The Silent King joined forces with Blood Angels to fight Tyranids in the Gehenna Campaign. But that's about it. Other leaders among the Necrontyr sorta have a stick up their exhaust port about working with "lesser beings."