Yes, there are numerous terrible potentialities to being a simulation, even out to such stories as Andew J. Wilson's "Under the Bright and Hollow Sky."

I'm not sure what the list of acceptable contracts would be for a simulated mind, and, worse yet, how hard it would be to design these into the, uh, fabric of simulation.

0) Being aware that you are in a simulation, I think, is the most foundational part. If you are unaware, it can be Gaslight Universe, a special kind of torment.

1) Being able to switch oneself off at will.

2) Being able to prevent being turned on later.

These rules cover a single instance, but I think further rules would need to cover, ah, swathes of instances forked from one base.

It would require some pretty radical copyright, too, especially for those "information wants to be free" folks.