Well, patrols (cities guards) are already attacking marauders automatically (because of our fame being lower than -50 everywhere). As Mithian explained, he was standing there because he killed the guards beforehand and since there is a small cooldown for the guards to re-pop.
But guards have an attack range, if you stay outside from their let say aggro-range, nothing will happen (it's the mechanics as with regulars mobs).
edit: Having the guards attacking players with wrong fame was a request coming from both side (marauders AND non-marauders players). Personally I hope the next step will be making federals guards in region attacking players as well.
But guards have an attack range, if you stay outside from their let say aggro-range, nothing will happen (it's the mechanics as with regulars mobs).
edit: Having the guards attacking players with wrong fame was a request coming from both side (marauders AND non-marauders players). Personally I hope the next step will be making federals guards in region attacking players as well.