The laws in many countries make it specifically illegal to break/circumvent DRM (even if making a copy, e.g. for personal use or viewing it on an unsupported device, would otherwise would be legal!), which is pretty messed up.

If you buy DRMed content because you know it's easily breakable, you are sending the signal that you are fine with DRM for purchased (not rented) goods, which is probably not what you want since it reinforces this unfortunate status quo.

If you want to actually support "asserting ownership" of digital goods, support DRM-free content.