Tim Berners-Lee’s intended the web to be writeable by all. Yet, for decades it’s been stuck in a “read mostly” mode. Everyone web surfs, some add content but very few really get to fundamentally re-express and re-structure web content. We know this. We wiki. Problem is, many don’t.
It is hoped that the icon will draw contributions to wiki-based sites, by serving as a reminder to how changeable they are.