Articles for Deletion discussions on the English Wikipedia, in theory, are NOINDEX-tagged so they don't show up in search engines. However, the same link, encoded with ?oldformat=true at the end, still does. This negates the NOINDEX tag somewhat.

For example, a search for foo will _not_ come up with https://en.wikipedia.org/wiki/Wikipedia:Articles_for_deletion/Foo but will for https://en.wikipedia.org/wiki/Wikipedia%3AArticles_for_deletion%2FFoo?oldformat=true.

See, for example, the second page of Google search results for "Todd Claydon".

This may well be something unfixable (it appears that Google is picking up on the URL itself).