Gee, its hard to follow that!!

Where's my cybersitter?
The most effective protests have lots of individuals associated with them who each send a personalized letter to the right place in the offending organization. Figuring out where the "right place" is can be tricky, but typically the higher the better, and avoid secretaries if possible. You can offer a sample letter for folks to use with supporting documentation and a mailing list of retailers, distributors, and company contacts.
All it takes is enough snail mail hitting the right desk and for the company to equate all those letters to an observable loss of sales to see a change in their behavior. (E-mail is dismissed as too easy to send and deleted.) In this case you can target the source and their primary distributors.
Demeanor is all important (don't lower yourself to their standards). For example you can simply ask to speak with the manager of local retail outlets armed with documentation that you can leave with them. You don't have to debate him/her or accept his/her "powerless position in the bigger scheme of things". Just inform them of your decision and that you're spreading the message to other consumers to boycott their stores.
Unfortunately audiophiles are relatively few in number and not accustomed to being social advocates.