"They've gone to great length to disguise the fact that I'm not in the band, even sending out a photo to promoters with my picture in it which then winds up in some of the ads on the flyers"

This quote by Jello Biafra is describing the lengths that his former band, the Dead Kennedys, have actually gone to in order to disguise the reality that he is no longer a part of the band. He is implying that the band has actually gone to fantastic lengths to make it look like if he is still a part of the band, even reaching to send a picture of him to promoters, which then winds up in some of the advertisements and leaflets. This might be seen as a method for the band to preserve their image and to keep their fans from knowing that Jello Biafra is no longer a part of the band. It could likewise be seen as a way for the band to keep their fans from knowing the reality about the circumstance and to keep them from feeling betrayed.