Can you Judgement before the surprise round? The judgement ability doesn't seem to have any vocal or semantic components to it. It's just a supernatural ability.. which means it doesn't provoke an attack of opportunity.
Great, but what about using it out of combat? Does using it on unaware target make them aware? As a swift action it can be used in a surprise round, but that does seem to me mean that using it starts the surprise round.
Let's face it, paladins walk around detect eviling everyone.. but that doesn't start brawls. :)