I would like to point out that this discussion (regarding the chess championship anyway) has already been had at [[Wikipedia talk:Chess championship]], and, much more importantly at [[Wikipedia:Votes for deletion/Chess championship]] where the community decided that it should stay. This should settle the matter for the time being as these sort of decisions should be made by the consensus in the community.
However, this being wikipedia, I understand that a vote that should settle a matter is seldom the end of the discussion I will provide the view from someone who does play games on the wiki.
We have seen many times that great contributors leave the project because of the sometimes excruciating difficulties this sort of project brings (we had one recently, if anybody recalls). Almost universally for these users they leave because of the air of hostility, the endless arguments and the general incivilty that, despite our best efforts, still cripple the project.