A topic from AEG's L5R CCG Rules forum, copied for Oracle of the Void from a copy of the forum saved in October 2015, so pages it didn't save are missing. Players' names are left out; the rules officials are named. Rulings are as they stood on these dates; later rulings, the rulebooks and the Rules Archive may differ.
A player, 15 April 2012
Heavily Engaged Battle: Even if you control no units at the current battlefield: Each player targets an unbowed Personality he controls there, if possible. Bow all targets.
Know No Fear Reaction: After another player's action targets your performing Samurai: Negate his bowing and movement from the action's effects.
Player A plays Heavily Engaged. Player B picks his Samurai and then reacts with Know No Fear.
Question: Can that bowing be negated by Know No Fear? Player A's action didn't target the Samurai, Player B did. Right?
Alex Jones (rules official), 15 April 2012
Heavily Engaged Battle: Even if you control no units at the current battlefield: Each player targets an unbowed Personality he controls there, if possible. Bow all targets.
Know No Fear Reaction: After another player's action targets your performing Samurai: Negate his bowing and movement from the action's effects.
Player A plays Heavily Engaged. Player B picks his Samurai and then reacts with Know No Fear.
Question: Can that bowing be negated by Know No Fear? Player A's action didn't target the Samurai, Player B did. Right?
Know No Fear may be played in response to another player's Heavily Engaged, since Know No Fear only cares about whose action it is, not who did the targeting.