Google created Sidewiki [0] in 2009 and killed it two years later. It was based on a browser extension. There have been many other initiatives, some listed her

Google created Sidewiki [0] in 2009 and killed it two years later. It was based on a browser extension. There have been many other initiatives, some listed here [1]; Wikalong was interesting but riddled with spam. Maybe a personal system (not shared) would help prevent content abuse? But then it would probably offer too little value to really take off. [0] https://en.wikipedia.org/wiki/Google_Sidewiki https://en.wikipedia.org/wiki/Google_Sidewiki [1] https://en.wikipedia.org/wiki/Web_annotation https://en.wikipedia.org/wiki/Web_annotation