Im sorry about starting this as a new topic, but I must refrain from necro old threads since none of them were started on this specific topic. (I have been warned for derailing when not sticking to the exact theme of the OP.)
Anyhow:
How about implementing castle doctrine?
For those of you who dont know what this is about here is link:
http://en.wikipedia.org/wiki/Castle_doctrine
For those too lazy to check out that link what it would mean in this game should be that if you
are on your own claim while being in combat with an intruder or a (former) friend for that matter wouldnt leave scents when you batter and/or kill the person.
This would hinder an endless circle of summon kills since you wouldn get scents from the one you tried to raid, but the raider would leave scents.
The whole idea of scents is a bit artificial but lets us have some kind of justice, make it more just.