So... for those who might find it useful, the absolute most effective way to deal with passive-aggressive behavior is to not let it appear to affect you. You don't even have to completely ignore the person as long as you are simply speaking and not reacting. Usually this behavior stops when the person notices there is no reaction to it. I don't enjoy immediately feeling all of these tense emotions whenever I visit this site, so just trying to help lighten the mood. Carry on.