The best way to predict the effect of any social media campaign against a person or organization is to evaluate the steadfastness of the campaign's target.
If you are the target of an internet mob and you blink, you're not only going to enact mob-demanded changes that are detrimental to your interests, but also broadcast weakness and attract further mob attacks.
If you instead stand your ground and refuse to be cowed by hashtag campaigns, the outrage mob eventually gets bored and finds another target. Your interests are preserved and you end up broadcasting strength and determination.
A lot of people are starting to figure out that internet mobs have no real teeth.