DRM takes away from development budget (it isn't free). If they are charging me for the experience, I don't want to fund something that, best case, detracts from my experience using the product. If there were an actual argument that the drm would prevent developer losses (I'm willing to ignore the overwhelming data suggesting piracy, in fact, leads to increased profits), I'd be somewhat sympathetic, however this is an online only, co-op game that requires server handshakes. There is not even a hypothetical benefit to invasive DRM, so why would I agree to pay for it?