There are many ways to be abused, in my opinion. Physical, emotional, financial, etc. are basic categories that we should all learn to consider in our study of "self-defense".
The history of abuse is very difficult to discuss in an open forum such as this due to the uncontrollable repercussions that can arise from this limited communication method.
We have recently experienced this on Aiki-Web and we need to be very careful of doing great harm along with our intent to do good.