The issue of license proliferation - Joi Ito's Web

"When I joined the Open Source Initiative board of directors, we were also struggling with a similar, but slightly different problem. We called it "License Proliferation". License proliferation was the problem of companies and projects creating their own "vanity" Free and Open Source licenses rather than using existing, established licenses. Because these vanity licenses were tailored (at times even just very slightly from an existing licenses) to address the particular steward's needs, they added to the complexity of the source, causing users to become confused and creating legally incompatible bodies of code....As sharing and the adoption of new, free licenses begins to accelerate, I believe we are in danger of creating sloppy licenses or incompatible licenses backed by torrents of content funded by well-meaning governments, non-profits, users and even commercial entities...."