As a GM I'm a somewhat confused by Obligation. The GM section says I can't force obligation on the players (p. 308). That's cool, but what happens when the players do something that would earn them something that pretty much obligation?
For example the players cross a local Moff by stealing from his art collection and he put a bounty on their head as a natural progression of the story. The players don't want more obligation, therefore none take any obligation to the Moff.
Still a bounty is in the obligation list.
At the same time the bounty is important to the plot (from time to time bounty hunters will show up with the intention of reminding the players that the Moff has not forgotten them).
I can't impose obligation on the players but sometimes the story will go to places that are covered by it.
How I deal with situations that should be obligation but players don't want to take it?
I don't like that such a mechanic may limit the scope of my stories just because players don't want to (even when character actions merit them)