Forgive me if this has already been suggested, but shouldn't we do a "write in" to our Federal MP's protesting this move by PC?
If every geocacher wrote his or he representative, cc'd to the PC Minister, Stéphane Dion, and this list, we might apply some pressure from the political side.
Of course, they current events on Parliment Hill are not conducive to getting anyone to listen, but individual MP's will be looking for support and are therefore going to listen if they get multiple complaints from constituents.
For what it's worth and hoping I am going over old ground.