What a great campaign idea: German non-profit organization EXIT, which is helping neonazis willing to leave the movement, handed out t-shirts at a rock festival by the extreme right that featured an imprint saying "Hardrock rebels". After washing the t-shirts at home, however, the revealed a different slogan, reading: "You can do what your t-shirt can - getting rid of neonazism". 

Here's the whole story (in German).