If you live in Britain, it is most likely that you have been barred from editing Wikipedia, which is generally the "free encyclopedia anyone can edit".
Reportedly, Wikipedia has been blacklisted in Britain by the British Government-backed Internet Watch Foundation over an article on the 1976 album 'Virgin Killer' by the band 'Scorpions.'
The article created a problem due to the graphic nature of the picture on the album's cover.
Following this, Britain's six main internet service providers have blocked their users from accessing the article.