I tend to be standoffish and overly sarcastic, and yet I've never run into these passive-aggressive rude people that everyone complains about, or gotten a warning about it. How odd.

Maybe it's because when I feel like it, I can actually converse like a reasonable person, and if the other person doesn't reciprocate, I can just walk away and let them stew in their own salt instead of wasting my time and energy on it. Probably comes from working in retail for so long and knowing when it's not worth trying to talk to people who clearly just want drama.