If I had a nickel for every time someone had an idea for community-edited overlaid content on other web pages, I'd be a very rich man. It has never worked. What

If I had a nickel for every time someone had an idea for community-edited overlaid content on other web pages, I'd be a very rich man. It has never worked. What will make your idea work? That is your fundamental problem, not whether or not it's a good idea. How you will make it work is the problem.