While I have no love lost for the shareholders of an evil company like that, I think that's the wrong attitude to take. As you pointed out, most shareholders aren't in any kind of a position to actually exercise any control over the company.
I'd still put this on the executives. They're paid the big bucks to be responsible for the company. Yet, it seems that more and more, we're looking for ways to continue paying them the big bucks, but remove that responsibility. All carrot and no stick, as it were.
Many of us own, through index funds, a small amount of Equifax.