separating the factions areas could be done in other ways such as mountain ranges, rockslides on roads, giant walls or impassible guarded barricades but invisible walls are incredibly immersion breaking and IMO is bad game design.
I agree with you.
First of all, I HATE the idea that you cannot go into opposing Faction land. To me that just plain stupid. There are a lot of other ways to prevent ganging that are a lot less extreme.
But if a "land lock" had to be implemented, the only good way to do that is with mountains and maybe some forts.
I am praying that Zenimax will abondon the immersion killing idea of "land lock" once and for all.
Edit: If i see an open area that I cannot cross because of an invisible wall, i am going to cry.....