Jail could be a good addiction in the game. A jail is a special type of claim that can be buildt only by the lawspeaker of a village in village's area. Scents left by thieves or killers can be used by the chieftain (or by the lawspeaker) to move the criminal's hearts of fire into the jail claim.
While a player's heart of fire is in a jail claim, he's only able to log at his own HoF , and he can't use the travel options.
The prisoner's hearts of fire is destroyed (or can be placed in the old place)after an X amount of ingame days (where X is decided when the heart of fire is placed in jail and should be greater then 0 and lower than Y days, where Y is decided by the admins) and the prisoner could teleport himself anyway.
If the jail claim is not protected by walls, the prisoner can left the jail simply by walking away.
The jail claim should be different by other claims, anyone should be able to build stuff on it and pick objects / harvest, so prisoner can be used to work (for example the can produce bread to feed the other prisoners). Structures placed on the jail should also be destructible (ony with the vandalismi skill), so prisoner can evade.