Prosumers and accessibility: how to ensure a productive interaction

User-generated content (UGC) has become prevalent on the Web. It is not created by professional developers, but by prosumers: basic web users that also produce their own content. Thus, they lack any background, training, wherewithal, awareness and accountability regarding accessibility. We have extracted from top-used UGC sites a set of best practices to improve accessibility of UGC, focusing on the role the community itself plays in ensuring it. As we have merely compiled best practices, authoring tools and web content guidelines have not been redefined, but rather referenced and instantiated by UGC-specific recommendations.