Jason, I agree with the others, the ad revenue is where it'd hurt the ARRL most. I'd amend your statement to something like THIS:
"Lets cut the crap, if any League action prevents me from operating the AM mode, I will boycott products, companies and suppliers advertised in QST. In fact, I have begun this boycott NOW. If you want to see evidence that hundreds of my fellow AM and ESSB enthusiasts are serious about this matter, drop by
www.boycott4bandwidth.com and take a peek. Imagine QST's ad rates plummeting! Imagine advertisers complaining! The boycott will only be lifted when we begin to see League actions which oppose bandwidth restrictions. Clear statements filed with the IARU would be a start. So get on the stick. Time's a-wastin!"
There's a lot more ESSB'ers than AM'ers. And virtually every new ham wants his Japanese transceiver to have "broadcast audio". Get those guys in your corner and you'll have the clout of big numbers. You'll need to set up a Flashy website with rabble-rousing rhetoric, Tom's
"blacklist" and alternative suppliers, and guestbook comments showing hundreds of ham calls supporting the boycott. It could be done. Webmaster, anyone?