In my limited experience (luckily never having been punished, only having been told what the punishment would be), AA does go for a "proportional" response to AAdvantage rule violations. So it would not surprise me if the punishment for some kind of OW award violation were prohibition against booking OW awards, as opposed to a more extensive punishment.
Remember that they want to keep you as a customer... they just don't want you to exploit the system. If they banned from AAdvantage everyone who tried to break a rule, they'd accomplish the second but not the first.