No, not an invitation to a rave (!), but a serious issue ANTI COPYING IN DESIGN. ACID is about Intellectual Property and recognition for the designer. UK Business Secretary Vince Cable has just proposed a change to copyright laws and you can add your support at: epetitions.direct.gov.uk/petitions/26273.acid.eu.com. There's also an ACID, 'Commission it, Don't Copy it!' campaign supported by Baroness Wilcox, Minister for Intellectual Property.
Think twice about publishing and distributing someone else's work without getting their permission first.