In Westeros nobody is legally allowed to pillage villages, slaughter peasants, and make off with the women, though we all know in times of war these things happen anyway but it's still a crime. The Ironborn can still reave but they're expressly forbidden to do so against citizens of the realm. And it's not like Dothraki can't still do it doggy style in front of everyone else, have lethal weddings, hunt the shit out of wildlife, and all the other fun stuff they do. The ones in Westeros just have to keep the king's peace like anyone else. 

Dany is a pretty strong-willed person, not one for compromise, but war, marriage, having kids, and twenty-five years of ruling changed her a lot in this RP. 

[@agentmanatee] Yeah but keep in mind it's gonna be a huge event and Jon likely won't interact with anyone besides Rhaegar. We're talking hundreds of fighters, so the odds of the king directly fighting anyone are pretty low and it's mostly a chance for your PCs to show off combat skill without hurting anyone too bad.