Baldur's Gate : The Sword Coast Chronicles : NWN2 Persistent World

How about random encounters with Flaming Fist or Amnian patrols on the Trade Way ?

It could function in the same way as the old Boareskyr bridge encounter : a neutral officer stops you to know what your business is (for example). Then through the discussion you have a couple of options, including fighting them all (and as discussed in the IRC they would have to yell "I SERVE THE FLAMING FIST !" ).

Or "FOR THE GLORY OF AMN!"

Cuz, you know...Amnian patrols serving the fist would be traitors....

And then all who did not paid or walked to jail would be banned for godmodding guards:)

All in favor, the law should patrol the tradeway to some extent and they really have it coming.