That's why, when deciding whether to put any on the digital version of my novel, I decided against it. I'd rather risk someone finding it and enjoying it for free than risk anyone being frustrated because of DRM.
Also, frankly, I don't care about consumers. My only real worry, if you can even call it that, would be against someone trying to resell my work as their own, which is covered adequately by copyright protections. I don't care if people get a free copy for their personal enjoyment. (Though of course I'd be thrilled by recommendations or reviews if they found it worthwhile.)
That's how it should be. Anyone obsessing over the consumer end of the deal has their priorities seriously out of whack.