Even then it's necessary to remain thoughtful and substantive, because that's the only way to preserve the container for intellectual curiosity. Our duty to preserve the commons here is a higher priority than lashing out at ill-doers who are further away.
To be fair, the anger came from my dislike of Facebook and similar services. Isn't strong language warranted if you talked about something you see as destroying the fabric of society? I thought that talking politely about them is already "normalizing" something that is harmful. What if the discussion was about drug dealers, the mafia, or such?