The thing about unwritten rules and unspoken agreements is that if someone breaks them either deliberately or accidentally, then it generates a whole lot of drama and fractures between people, leading to groups not talking to one another, which is harmful in the long run, to everyone.
So, no, I do not regret bringing it up. Someone has to.
And the thread in question has been updated subsequently, to make it clear the actors won't call people out.
So the actors wont be going around saying "Hello Bloodfriend!" to any of the blood raider players, or similar kinds of things, and it's up to the players to reveal to others through their actions what's what, through doing things ingame&inspace, rather than foruming.
So, \o/