I would attend also, I think the biggest issue is getting the majority of our support out in protest or even a good 5-10k of them, doesn't need anywhere near the 50k mark but needs to be substantial to make any difference.
10k would make them think, that's over £250k per game, although with most having season tickets you would be looking to attack league cup games (No more this season after tomorrow) or targeting next season. A massive non-renewal of season tickets in feb would make them s*** themselves.
I would be more than happy to turn up for a game and not go in.