Businesses Crack Down on MyFace

This is an interesting article about a new trend that is emerging within the business world... companies are blocking access to social networking sites. "According to Dean Drako, the president and CEO of Barracuda, the two top reasons cited by companies for blocking access to social-networking sites MySpace and Facebook are security (70 percent) and productivity (52 percent). Other reasons cited by companies for blocking the social networks include bandwidth issues and legal liability.
Four times as many companies -- nearly 25 percent -- block MySpace, while just one in five block employees from accessing both sites. "

What are your opinions of this and what do you think should be changed if you disagree?