I'm not typically one to make passive-aggressive marks at people, let alone curse someone out if I'm in a foul mood. I've noticed that my first reaction is to bluntly say, "We gotta do this, this, and this," if I feel someone isn't doing the mechanics. It's when someone makes the first mark at me that I play their game and bark back at them.
Is that the best solution? Not really. But sometimes it feels good.
Edit: Sometimes I fail at inflection. Recently, someone told me, "Dancer, you need to be aoeing groups." They had a point, but I was kind of irritated at the time, so I sarcastically said, "Anything else I should be doing?" Of course, it didn't come off that way -- it came off to them that I was genuinely seeking information on how to better my own contribution to the run. I guess that's one instance where I failed at snapping at someone.