Talk:Kha'Zix/Strategy/@comment-152.27.40.2-20120928132216/@comment-174.1.83.172-20120930181443

Except they do negate his passive if he is within range of a champion's sight, as the game only checks two things. "Is Kha'Zix within [sight radius] of an enemy champion. Yes? Can he be seen by that champion?  Yes?  No buff." If either of those are no, then he gets the buff. So if the bush is warded and you're too far away, he gets the buff. Conversely, of course, if you're close enough and you can't see him after he enters the bush because of no ward.. Then he gets the buff.

TL;DR, if Kha'zix is regularly juking into a bush to bolster his damage in trades, warding the bush will prevent this. In fact, if he keeps trying to do it, the extra time between attacks may even lower his DPS.