On other occasions, you might get into altercations with troops from a royal house – e.g. if you hire a thief from one of the settlements under that house’s patronage, a random event might trigger where you have to give the thief up or fight (or try to trick or scare the troops so that there’s no fight). If you piss off a house enough, presumably you’ll be barred from all of their settlements and have the option to attack any troops or caravans originating from them.
Here it goes some problem: will you be able to sell a loot? In some m&b variations bad guys can sell loot in bandits lair if they are bad enough. Maybe in the release version such behaviour will be possible in BB too.