This is a community-building issue.
Okay, yeah, probably you can never have outright let’s-murder-each-other-on-sight factions and have it work. But why would you want to? If they only interact to fight, there is no reason for the opposing group to be PCs.
But stuff like “Green apple Fossoways hate red apple Fossoways and they’re each trying to be the ruling branch of the house,” and the deal where everybody’s trying to steal the McGuffin from whoever has it right now, can be fine fun.
It needs a supportive community to be fine, though. It works on private games because everybody there thinks everybody else’s feelings count and actively wants every other player to have a good time. When this trust is broken things crumble.
Which is no surprise. There are big differences between:
Dracula: “Well shit.”
Van Helsing: “Yeah, the dice were cruel to you! But that was great, loved the way you played it out, I had a blast.And you’ll get yours once you climb out of that hoiy-water-contaminated well.”
And:
Dracula: “Well shit.”
Van Helsing: “I understand that you’re very upset. In this essay I will explain how you are wrong and a problem…”
And:
Dracula: “Well shit.”
Van Helsing: “It sucks to suck.”
Also, yeah. There’s gonna be drama. There’s just gonna be drama. Making some space for the dramas of RPG-related fee-fees is part of gaming. Gamerunners and players can draw a line about how much space and what kind of expression of ye feels. But “never express any kind of upset about the game or your interactions with others on it” isn’t reasonable. Games nobody cares are not good games. You want players to be invested. Passions will rise. Characters don’t have to die for passions to rise.
Players in general and game runners in particular really ought to try to avoid drawing that line at who’s drama rather than what kind of drama.
Drawing the line at a who is how you get bullshit like it not being ‘drama’ when Abelard raises a “Bridget refuses to compromise in RP!,” fuss, but when Bridget replies, “You refused to turn off your camera, you were obviously bluffing, I’m more afraid of proposed-betrayee I am of your threat, and I don’t even have the information you were trying to blackmail me to get,” somehow Bridget is the drama-creating problem.