Forum Post: Digital Participation.... Signs that represent digital participation in the protest

Is there a way to set up a "counter" for all those that wish to participate but cant make it to a physical site? I think there needs to be a way to represent all the people interested in participating, but who cant physically be there. It can even be number signs held up by people that show how many people are logged on to a particular website or online format. the number would represent people at the protest, and can update from a digital form to an analog representation.