If we can Zappa, then great. But short of that, we need to build the momentum and awareness in the support. Without that any ideas about things like mass boycotts or even serious organised protests beyond the enlightened hardcore of the union will struggle. The more we can sew seeds, the better. It doesn't matter if Hicks and Co say 'so what' for now - what's important is that we keep the momentum going (the Echo felt it, and it ran with the front cover last weekend).
They might say 'so what', but we'll hopefully undo some of the work done by their PR advisors, which has been devastatingly effective you have to say. Simply telling them to back off and shut up was a masterstroke.
We need to remind people about things like SteveZissou's documentary.
Edit.
In practical terms, we can get the US supporters clubs involved, and we need to do that here anyway, so can we compile contacts? We have a few people on board already and if we can spread the word and get more on board, then great, but I do honestly think short-term hopes of actually influencing anything in the way Hicks and Gillett act are, well, hopeless. All we can do is encourage the fans to come together and unify to assert their stake.