a study published in 2007 by sportfive reported hansa's fanbase to be the seventh largest in germany, involving up to two million supporters. according to another study published in 2008 by allensbach institute, hansa is the most popular german football club in the new länder and the most popular club of the former gdr in reunited germany. hansa rostock's official anthem is "fc hansa, wir lieben dich total" ("hansa fc, we totally love you"), recorded in 1995 by east german band puhdys. hansa struggles with hooliganism, estimating up to 500 supporters to be leaning towards violence. the club itself as well some fans' associations are anxious to curtail these in several ways. in 2005, the club successfully sued three streakers who disrupted their 2003 match against hertha bsc to recoup the €20,000 they were fined by the german football association (dfb) for failing to maintain adequate security at their ground.