Your 140-Character Shaming Campaign is Weak
Shaming doesn't accomplish what you think it does. I mean, sure, it makes you feel like you're part of some sort of solution—the internet tribal equivalent to the end of Game of Thrones where the evil woman (I don't watch the show) is stripped naked and has to endure taunts and vegetation thrown at her. It does not, however, move things forward in any real way.
How do you want to be defined? By one action? By some opinion that could evolve? By a mistake, regrettable only with hindsight? Or by the sum of your parts? Okay, do that for other people. Start the trend.