I can only speak from my experience, of course.

I don't personally talk much during roulettes, dungeons and whathaveyou... but in all 7 years of playing this game what stands out to me when it comes to negative interactions is passive-aggressiveness. It is as though passive-aggressiveness is the bread and butter of Duty Finder. It has been exceedingly rare for someone to be caustic in these instances of unpleasant player interactions. Nothing is ever really said "outright." I have hardly ever seen someone directly insult someone else during a DF run.

There are only statements with varying degrees of irony.