Unofficial Official Rulings thread

For some reason, FFG did not see fit to bestow this forum with an Official Rulings thread (like they did, say, here: https://community.fantasyflightgames.com/topic/277422-legend-of-the-five-rings-official-rulings/), so I thought it might be useful to have an unofficial one for random little rulings that might not deserve an entire dedicated thread. (I encourage people to start a new thread if you do indeed want to discuss a specific ruling posted here, just to keep this thread clean.)

Here's a doozy, again courtesy of @Onidsen… Assume that I have a warrior character equipped with the attachment Vigilant Guard as well as the Mithril Shirt. If I reveal Necromancer's Reach, which deals one damage to each exhausted character, may I choose to trigger the response on Vigilant Guard every time an exhausted character would take damage, and then reduce each of those instances of 1 damage by one with the Mithril Shirt, thereby doing no damage at all [?] If I can do this, can