I seriously doubt you're giving all the information because whenever someone comes to the forums going "I got banned and I never did anything" it always turns out that they did. And since you whine about "Social Justice Warriors", it's safe to assume that's the case here.

I've literally never been banned or even got a warning for disagreeing with someone in all the years I've played, so you probably crossed a line. Maybe stop to consider what you say next time.