That's a bold statement for someone whose signature (inaccurately) quotes Benjamin Franklin.If you pirate you are stealing - period.
I don't know about (and don't care for) the situation in the gaming industry, but the (illegal) download of MP3s makes me buy more records: if I like it, I'll buy it - if I don't like it, I won't listen to it anyway. But I can see that the situation is probably different with respect to software.
Anyway, in a free market, the customer decides about the distribution model. If you don't like DRM protected games, then don't buy them. By spending money on things you don't like, you keep getting sold things you don't like.
Greets,
Philip