True, if you spend enough time on Facebook that you can block social viruses as they appear, then you will never see more than one or two at a time. But there

True, if you spend enough time on Facebook that you can block social viruses as they appear, then you will never see more than one or two at a time. But there is no technical reason why Facebook doesn't allow users to categorically block a virus developer. It's a political reason: new viruses entering the system get new eyeballs, reinforcing the business model.