What's more important, DRM should never be used. Because it never makes pirating inconvenient to the 99.99...9% of the pirates. The 0.00...1% which go through the trouble of breaking that DRM redistribute DRM-free copy to all other pirates, who never deal with that DRM altogether.

What it makes inconvenient is the usage of that service / product for users who actually pay for it. It's a brain dead idea.