[wybiral]

Exactly. You could tamper with most systems if you had that much physical access, including paper counts. Which is why there are procedures in place to minimize that potential.

Plus an attack like this would be isolated to the single machine (not that it wouldn't be bad, but it wouldn't be applied in a distributed fashion).

[makomk]

With paper counts, it's easy to verify that the box is empty when it's initially sealed. With voting machines not so much.