wtr100,
It will not happen over night, but you can educate even blond Chicagans.
Yes, the reports are that he was wearing a kevlar helmet, "bullet proof" vest, ballistic leggings, and a crotch protector. However, even my .380 acp or .38 Special +P would get his attention and distract him. My .45 acp will change his course and even knock him off his feet.
None of us can guarantee that we will or be able to act in the way we hope in a situation like that, but we must still be prepared and ready. Interviews of people from the front two rows talk of how he entered, threw something, maybe a smoke bomb, in the air, and he began firing into the ceiling. He then walked up the aisle "sparing the front three rows." With my training, practice, and tools, what could I have done if I were in the front row or two?
This situation is a prime example of how disarming law abiding citizens aided and raised the death count.