Knitta is a tag crew of anonymous rogue knitters who leave graffiti on monuments, utility poles, and other public items. Unlike traditional taggers, Knitta uses non-damaging materials, such as yarn and cloth. Started in 2005 by two women tagging the Houston metropolitan area, Knitta has grown to 11 members. Up to a dozen groups have followed their lead worldwide. The crew has been invited to show their art in Los Angeles, California; Paris, France; and elsewhere.