I think here's a good suggestion from the article: "... make it more difficult to create and share low-quality information. This could involve adding friction

I think here's a good suggestion from the article: "... make it more difficult to create and share low-quality information. This could involve adding friction by forcing people to pay to share or receive information. Payment could be in the form of time" This could mean a simple rule such as: "You can only post once a day (for free)"