IIRC... I've heard that wearing heavy armour in another clan's lands can be considered a declaration of war. Wearing it at a celebration or when visiting court also suggests that your character doesn't trust their host to protect them (like Marie said). However, Crabs are more inclined to wear armour than other clans a lot of the time.<br/><br/>At least that's what I remember. I think what our group did was put it on if they were going to fight something, otherwise leave it off.