You get the blue screen of death or an error message that says, Please reboot, and there went all the votes for hundreds or thousands of people. I ve worked with computers since they had vacuum tubes. They are wondrous, but are also notorious for failing when you need them most. The dirty little secret of the Internet is that it lacks privacy and is very easy to hack or corrupt. I think that can be expected to get worse, not better.
Security is a major issue.
After having their private customer credit card data stolen, the companies were financially extorted under the threat of public disclosure of their customers' data. More than one million credit card purchasing records have been stolen. For voting to work and our democratic society to stay free, two things are necessary. Voting must be fully anonymous AND fully accountable. Some experts believe that is impossible if computers are used.