The US music publishers organisation, NMPA has sent takedown notices to the top 50 unlicensed lyric sites in the USA.. NMPA is working with songwriter and University of Georgia researcher David Lowery who published an academic study listing top unlicensed lyric websites. These lyric sites profit from advertisement-generated revenue, yet songwriters whose lyrics are available on these unlicensed sites receive no compensation. More information can be found here: http://www.nmpa.org/media/showwhatsnew.asp?id=94
The New York times also has a report on the NMPA action: http://www.nytimes.com/2013/11/12/business/media/in-music-piracy-battles-lyrics-demand-respect-too.html