This is exactly why I hate electronic voting. When I argue about it, people always tell me that it's easier to commit vote fraud with paper ballots.

Sure, it's easier for a single person to temper with a single paper ballot or even poll box, but it is much harder on a large scale. Tampering with every physical boxes and tallies in a country requires much more effort and organisation than exploiting a single vulnerability that applies to an endless series of identical machines.