Is not too late at all. If you remove the "is not my responsibility what my users publish" for forums beyond X thousand users, every forum will stay under that

Is not too late at all. If you remove the "is not my responsibility what my users publish" for forums beyond X thousand users, every forum will stay under that limit and twitter quickly will become thousands of independent sub-twitters ala reddit. No home page aggregating everything, no suggested tweets, no country-scale public square