If there's 25 people in the region from 4 different realms, how would they know you did it?
And how often is that? Mostly its not many nobles in a region which is away from the main "roads". Seriously, its not possible to stay an infiltraitor in a realm which is not at war if you want to remain active. ALL times you will be responsible. As you can see who is in a region even without scouting.
Current way does not make sense to me. If you are going to assassinate somebody, then you will change clothes and hide. Stay away from main roads. Travel alone. Instead of parading around like a normal noble. If a noble can not stop parading, then he can not be infil. Current way just does not make sense to me.
