I very carefully say "much less likely" and not "impossible" because with how these work, they'll still pick up subtle signals for these things anyhow. But, frankly, what do we expect from simply shoving Reddit probably more-or-less wholesale into the models? Yes, it has a lot of good data, but it also has rather a lot of behavior I'd like to cut out of my AI.
I hope someone out there is playing with using LLMs to vector-classify their input data, identifying things like the "passive-aggressive" portion of the resulting vector spaces, and trying to remove it from the input data entirely.