Interestingly, I think that one of the examples of proving too much on Wikipedia can itself be demolished by a proving too much argument, but I’m not going to say which one it is because I want to see if other people independently come to the same conclusion.
For those interested in the puzzle, here is the page Scott was linking to at the time: https://en.wikipedia.org/w/index.php?title=Proving_too_much&oldid=542064614 The article was edited a few hours later, and subsequent conversation showed that Wikipedia editors came to the conclusion Scott hinted at, though the suspicious timing indicates that they probably did so on reading Scott’s article rather than independently.
For those interested in the puzzle, here is the page Scott was linking to at the time: https://en.wikipedia.org/w/index.php?title=Proving_too_much&oldid=542064614
The article was edited a few hours later, and subsequent conversation showed that Wikipedia editors came to the conclusion Scott hinted at, though the suspicious timing indicates that they probably did so on reading Scott’s article rather than independently.