Harry Potter fan Heather Lawver is organising a boycott of Potter merchandise because of legal action threatened by Warner Brothers over her website.
Lawyers from Warners have been sending legal noticies to Lawver, a 16-year-old from Weston, Virginia, and other website creators, demanding that the sites be shut down.
The company purchased the trademarks and copyrights for their film version of Harry Potter and The Philosopher's Stone, to be released in the autumn, and claims that the fans' sites are "likely to cause consumer confusion or dilution of the intellectual property rights".
As a result, Lawver and Alistair Alexander, of London, started the boycott, called the Defence Against the Dark Arts project.