There is basically 2 levels of play combating here: those who know the intricacies of Warriors, and those who do not. Players like Atreiddes who play Warrior are right in that an above average Ninja will know instinctively when to Goad, but the majority of players, the average Ninja, will not know. Proper edicate should be to ask for Goad when needed, as most Ninjas will be average and not know, or not think about it. If your running a tight knit group, or static, then you can berate your Ninja comrade for slacking his comprehension =)