A survey has found that large numbers of employees are now being blocked from accessing Facebook.
The statistic comes out of a new global poll, with a very small sample of just 600 workers, carried out by security company Sophos, which found that 43 percent of them were unable to access the site, while another seven percent could access it only with restrictions.
"More businesses are restricting access to these kinds of sites. Employees may not like it, but these websites can represent a security risk if used carelessly. Unless there's a work purpose, many firms do not see any reason why staff should need to access them during work time," said Graham Cluley of Sophos.
Extraordinarily, of the half who could access the social networking site, eight percent stated that the access was allowed because companies feared an employee backlash if it was stopped.
The main worry appears to be that employees will waste time on Facebook, the latest in a long line of social networking sites to garner a mainstream following. However, in a separate poll carried out by Sophos, two thirds said that they were concerned about co-workers sharing too much information on the site, fearing this might lead to targeted phishing attacks against employers.
Sophos has published a security-cum-marketing guide to Facebook on its website.