Should we ever get to the point where the computers we use present more risk than provide value, it will undoubtedly be time to unplug them.
I could write a very lengthy article on why I am in the computer security field. But I'm not going to.
Instead, I'm going to link to a news article about the U.S. Commerce Department's Economic Development Administration. This is what I want to help prevent from happening.
Computer Virus Plunges Government Agency Into Dark Ages