Wikipedia's Jimmy Wales expressed support for 24-year-old Richard O'Dwyer, who was arrested at his university dorm in 2010 by British officers accompanied by agents from the U.S. Immigration and Customs Enforcement. O'Dwyer's alleged crime was running a file-swapping website called TVShack.net, where users shared links to movies and television shows, many of them protected by copyright.

Wales said merely posting links is not a crime and urged citizens to stand up for their rights online.

"Richard O'Dwyer is the human face of the battle between the content industry and the interests of the general public," Wales said in an online petition posted on Change.org, adding that the student had always done his best to "play by the rules."

By midday Monday the petition to halt O'Dwyer's extradition had gained more than 20,400 signatures.

The Guardian newspaper has thrown its support behind O'Dwyer as well, saying in an editorial published Monday that his case was "unfair" and "absurd."