1. Publishers decide to treat all potential users as criminals, and insist on using DRM in their products.
2. Distributors accept that, and help these unethical publishers to sell those products.
3. Users accept being treated as criminals, and buy these products from distributors.
It starts from the publisher of course, but anywhere down the line, one can refuse to accept this. Distributor can refuse dealing with DRMed products from publishers. Users can refuse buying DRMed products from distributors. Any participation in that chain proliferates DRM, and one can't excuse this participation with the fact that it was initiated by the publisher.