The City of Toronto has banned its 23,000 employees from using the social networking site Facebook on work computers. Politicians, however, are exempt from the ban because they use Facebook to communicate with their constituents, accordiing to city spokesman Brad Ross. A week ago, the province blocked access to Facebook on staff computers. The site is also banned in most federal departments in Ottawa. Ross said there"s no sign that city employees have been wasting time on the site, "but to mitigate that possibility, we just simply denied access. Does it serve a purpose that a city staff, city employee have access to Facebook? Does it do anything for the city? The answer would have to be no." Other websites already deemed unacceptable and banned by the city include pornography sites, gambling sites and YouTube.