In an action of this kind, you want to demonstrate organization, capacity, and that you have real numbers behind you. Having people silently not use the internet on a major U.S. holiday achieves none of that.
If the goal is to get people to share the hashtag, then that should be the focus of the action.
A failed strike is much worse than not striking at all. But frankly, this seems more like a vanity effort than a serious attempt at change.