They _are_ entirely not to blame for what they get. What they _are_ to blame for is their own behavior.
I don't have a problem with you saying that some people are irritating and do annoying things. What I have a problem with is the suggestion that they _share in the blame for what others do to them as a result_. There is a difference there, and it is an important one.
To be clear, I am going on the principle that a person is alone responsible for their actions, and not for those of others.