So instead of flaming people, like you did with Abel, start a team which works on this effort (the merging, especially). If you move data from one wiki to another, remove the content, and link to the new content. Then you know what has been merged and what hasn't and a pointer is there, too. But, like I said, the people who do this need to have the incentive to do so, and I think due to above reasons there isn't enough incentive (yet).