Im sure most of you have heard of the "Fable" and "Knights of the Old Republic" video game series. Perhaps their good/evil alignment system can be implemented into Haven and Hearth.
Perhaps someone who has committed many crimes can have a malignant aura around him, it doesn't even need to be graphical. If you stand close to a person who is evil you feel "dread" and a box like "thorn in you foot" or "travel weariness" will appear on your screen. Of course then you will know to GTFO. Likewise, a "hope" box will appear if the person you are standing next to is benevolent.
Perhaps if you are scared that the noob hunting industry will be hit too hard by this change then a skill should be needed to see someones "aura". It can be called empathy and cost as much as ranging
What do you think?
Feel free to post changes to this idea that you believe would work better or different criteria for changes in ones alignment.

Example Dread Symbol

Example Hope Symbol
EDIT: To get around justified murders, perhaps if you have ever held a person's scent before killing them you get positive alignment and for self defense, a person who initiates combat gets the negative aura.