Complacent and 'too-busy' users are responsible for the rapid spread of viruses, according to a study released Friday. The 'nothing to do with me' mob are the major offenders, making up 90 per cent of the 1,000 UK employees surveyed. This vast majority believe that they have no part to play in preventing the spread of viruses, and that it is the responsibility of the IT department, Microsoft or the government. Steve Brown, UK MD of network and security outfit Novell - which sponsored the report - said: "Viruses only work if there are people dumb enough to open them and pass them on." Read more: Silicon.com.