Actually, the entire Tundra was available for everyone who wasn't a large faction to trade in. Just about anyone could ask for trade rights, and very few were denied.
You and your guy(s) attacked our traders more than once, which made your faction be put onto a blacklist within the trade group, hence the attacks on you and your members. Not to mention, several of the villages and castles in question were entirely free trade from the start.
We're not trolls, we're merely intrigued by your hypocrisy.
Also, my faction (regardless of my presence) is at war with FCC, so I'm not really sure how I'm their vassal.