We were already past productive conversation when people started pushing a lie. Cutting that dishonest tangent off via debunking is the only way to bring it back to productive discussion. If you can't defend your position's validity and resort to personal attacks and flaming at the person who just debunked you, that's a "you" problem, not the debunker "passive aggressively baiting". In what world is debunking a dishonest post "baiting" the person who made it?