Adding DRM to the HTML standard will have far-reaching effects that are incompatible with the W3C’s most important policies, and with Berners-Lee’s deeply held principles.
For example, the W3C has led the world’s standards bodies in insisting that its standards are not encumbered by patents. Where W3C members hold patents that cover some part of a standard, they must promise to license them to all comers without burdensome conditions. But DRM requires patents or other licensable elements, for the sole purpose of adding burdensome conditions to browsers.