With social media boycott campaigns it's hard to separate the noise from impact on the bottom line but with recent stories of Uber and what was occurring behind the scenes, the #DeleteUber campaign actually did have a negative impact on the bottomline that was felt and was definitely a huge driver for the board moving to remove Travis which is underreported as everyone instead focuses on the drama that occurred as that sells as a better story from the press side.
With Facebook it will really be about how many people truly delete Facebook.
The difference of course is that every Uber user was generating significantly more revenue on average than the avg Facebook user, so the number of users that delete Facebook would have to be much more significant.
Also interesting, is what is the global response. Is this localized to the US, are many people globally doing the same thing?
If it doesn't impact the bottom line through a massive amount of users deleting, then the stock will bounce back well before the next quarterly earnings report.