I am a game developer. My game is available for ios, android, mac, and pc. So I am giving my perspective on DRM from the other side of the fence.
I do not add DRM to the game.
Piracy, especially in android, is rampant. I die a little inside every time I see someone stealing my work. Meanwhile DRM whispers to me "come and play".
Laws are useless. I could spend my day sending take down notices all over the web. 5 minutes after I take one down, 10 pirates post it in some other place. So I don't do this either.
So what alternatives do we have? lets see...
In app purchase? Hated by a lot of people. Maybe even more than DRM.
Bundling (humble bundle)?: You can do that once or twice, not a long term solution
Advertising? No revenue.
So yes, go on, oppose DRM if you like. As I said before I don't do it. But don't stop there, think which one of these other business models you do support.
Don't just say "I won't buy this game because of DRM", instead say "I will buy game X instead of Y because of DRM", as that speaks much more loudly.