While I like the idea of people not turning up I really can't see it happening.
Turning our backs on the ground at half time, or at the first bounce, I think would make a really good point. I don't have facebook either but if we got all the fans in one part of the ground doing it then others will likely follow. If we promote the reasoning, that we are not happy with the way fans are being chucked out for very little, then it makes the point clear. Not sure if we could extend this to the standard of umpiring and the arbitrary inconsistent umpiring, but I would say it is best to keep it to one issue: fans being treated badly.
To make sure the message is clear we would need to use twitter maybe (I have no social media so no use on that score) to get a flood of tweets going at the same time.
DS