From French Fashion:

Ignoring the strict dress code of the Paris offices can only mean that the system administrator is a mysterious person in the IT world who lives in a different dimension. He can wear a fatty tail and not pay attention to the smelling fresh haircuts of users of "his" computer park. Only he can sleep at work, wear scratched jeans, a lengthy sweater, tattoos, metal chains... A lot! Even smoking at work, despite the fact that since January 2, 2008 in France, smoking is prohibited by law in premises, public places and even in English pubs.