Most people aren't actually doing anything that really affects the bottom line in a typical software company. Maybe if a few people performed acts of sabotage as a statement, that would make a dent, but that would effectively be suicidal.
But this is already true, whether there is a walk out or not.
Even if they are sitting at their desks, if the employees are all frustrated and have other matters on their mind, are they producing good work? I would say no
Execs see the battle has already been lost, because it has been. The company morale has been hit, doesn't matter if walking or sitting at your desk or whatever.
Can I summarize your reply as if you don't like it quit?
I don't have any issue with this form of protesting, I'm just explaining why I don't do it.
I like to help bring about change by 1) being the change I want to see in the world 2) convincing a small group of more personal connections to see things my way
I think if we all did that, the world could be a good place
To clarify even further, there's been a lot internal messaging internally from execs condemning sexual harassment and assault since the news cycle. If one believes this messaging, then walking out adds almost nothing more to the situation. If you think the execs are lying to you at all, but especially on this topic, you probably already quit (most google employees don't have problems finding alternative employment)