Graffiti
Since the mid-1980s, the Stockholm metro has been seriously affected by graffiti. Previously a train on which graffiti had been painted could remain in service for weeks and graffiti could remain in place at stations for months if not for years. Nowadays, however, trains with graffiti are taken out of service immediately and graffiti at stations is regularly cleaned up within a few days. The cost of graffiti and other types of vandalism has been calculated at approximately SEK 100 million per year.
During the 1990s, the Stockholm Transit System (SL) started outsourcing security to private security firms, some of which have been accused of using unlawful methods, such as the use of plain clothes guards and heavy-handed treatment of vandals arrested, and even heavy-handed treatment of ticketless passengers trying to escape. Since 2005, the Stockholm Police have assigned a special task force (Klotterkommissionen) to address the issues. The mainstay among the private security contractors in the fight against graffiti is the Commuter Security Group.
Read more about this topic: Rapid Transit In Sweden