To all the other commentators, this isn't about wikipedia, this is about a tool that can be used by copyeditors to help them enforce house style and grammar rules.

If you work for a magazine publisher, it's likely you have 2 lines, a web line and a published line. The web line might not go through the copyeditors/production/subeditors before it goes online whereas the published line will likely go through those people/departments. By adding this into the web line, it can help enfore the rules of the publication so that web and magazine both match up nicely.