If that is a bad Aikidoka, then so am I.
The way of Harmony is the balance between, Ying and Yang, Right and wrong, life and death. If someone threated me and I did EVERYTHING I could to get out of the situation, then I would use the skills that I have been taught to their fullest effect. I am no coward.
Aikido is about balancing wrongs with rights.
"One who has gained the secret of Aikido has the universe in himself. He is never defeated, however fast the enemy may attack. It is not because his technique is faster than that of the enemy. It is not a question of speed or strength. The fight is over before it is begun."
To question your "morality" of Aikido is a great thing. Fighting your inner demons, the true enemy. A great question.