International Day Against DRM
DRM can be a huge problem for genuine, paying consumers across a range of media: computer software, music, video and even books. One of my personal bugbears is how difficult HBO make it to access their content online: their close links with the large US cable networks make it absolutely impossible to pay for HBO shows without signing up for a much larger package (in the UK, with Sky). DRM has been extended to such a point that it actively prevents some people for paying to access content.
Dan York has written a great article on his personal issues with DRM particularly with respect to books.
To celebrate the occasion, O'Reilly are making all of their (DRM free!) ebooks available for half price.