Why give them a "false choice?" If your intent, if they say no, is to beat them into submission, why not just say - sorry no evil PCs here and stop. Punishing the players (because that's what's happening) doesn't really contribute to anyone's fun.
Did you miss the bit where that's exactly what I said?
There was no false choice. I made it
perfectly clear that 'random repeated acts of murder' are
not the sorts of things good aligned PCs do (a discussion that is also had at session zero BTW). If the 'good aligned' PC persists anyway, his alignment is set to 'evil'.
Good means 'altruism, respect for life, charity and avoiding harm to others, unless reasonable in self defence or the defense of others, and no other option reasonably presents itself'. Captain America is Good. If Cap wouldnt do it, neither should your Good aligned PC. Evil means 'harming others'. Frank Castle is evil, because that's what he does - he harms others. Neutral people lack the convictions to go out of their way to help other people, but possess enough empathy to avoid harming others.
That's a discussion had in session zero, and had again with the 'LG' player when he's about to murder some NPC tavern-keeper, and burn down the Tavern because he didnt want to fork out 5 copper for the night.
As to him being hunted down for murder, that's simply the
consequences of his actions. If I was running an Evil party, and they engaged in random acts of murder as well, those actions
have the same consequences.
Believe it or not, in Faerun (where I run my games), adventuring parties are not rare, and most local lords (responsible for enforcing the law) have access to multiple mid to high level Clerics, Mages, amies, Knights etc and all sorts of shenanigans to track down murderers, and bring them to justice.
Some random peasant in isolation? Probably overlooked. Someone important, or a connected person, or a spate of such murders, or in a town headed by a Lawful creature? Game on.
Take
Beregost, a town of under 3000 people. It's headed by a 16th level Cleric (Lathander) who has at his disposal the Flaming Fist (Mages, Clerics, Knights, Champions etc) and 'hunting down and putting an end to powerful adventuring parties causing trouble' is expressly what they do.
Presume a local 2nd level priest turns up murdered (by the PCs, over some petty grievance). A young man who was friends with the aforesaid high priest.
Leaving aside the fact he likely gets
Raised from the dead by his mentor and tells him exactly what happens in person
, Speak with Dead is a 3rd level Cleric spell. 'Who killed you' is the first question. Failing that we have
Commune at 5th level to ID the perp, and then ask where they are at present (plus one more question).
Legend Lore is 5th level and that gives you information on the target.
Scrying is 5th level, and lets you pinpoint where they are.
Zone of Truth is 2nd level and permits a thorough interrogation.
Those that dont have such access, hire NPC adventurers to sort it out for them. People like the PCs.
Lords don't just let murders happen, any more than the Cops dont IRL.
How is it a "win" to lose the ENTIRE gaming group?
I consider it a win to discard players who write 'LG' on their character sheet, and then go around murder-hobo-ing worse that Ted Bundy, slaughtering other people for nothing more than a few copper or a petty grievance.
Particularly after I've already spoken to them about such behavior, why it's in direct violation of the alignment they choose and what we discussed at session zero, and they choose to continue doing it anyway.
Test my patience as DM and you'll be looking for another table. I'm firm, but fair, and don't play with argumentative players, sooks, murder-hobo brats or anyone of that nature.
It's unfortunate that there was a clear clash of styles.
Yeah, and that dude can play his 'style' at a table that wants him.
Like I said, it's a win/ win.