Oh, that is simple! Articles posting negative information about liberals are generally unadorned. However, a large number of negative articles about conservatives, true / false / or tongue in cheek will be adorned with the following.
Reported by Diggers as Possibly Inaccurate
My guess is that conservatives automatically challenge any Digg article that reflects negatively for their position or candidate. Does this automatically make conservatives bad people?
No, but it does make me want to read that article.