The rewritten Style Guide has an open discussion of the spoiler policy. The current policy will be used if no new consensus is reached. Discuss it here.
Now the question is, why would anyone hurt either the Maid or Desu-chan or Onee-chan just to see this event. T_T
This game is famous for having alternate methods for pretty much anything, yet you can't trigger some events without killing some important and/or lovely characters...