[Antoninus]

I don't think this is true. See page 10 of this document which says:

Some voting systems and some states implement watermarks to be printed on the ballot that are specific to an election or designate it as being printed by an approved printing authority providing a visual cue that the ballot is authenti

MAIL-IN VOTING IN 2020 INFRASTRUCTURE RISK ASSESSMENT

Still, wouldn't it be fascinating if this attempt at a massive steal was anticipated?

[reasonisfaith]

This came later:

https://thehill.com/policy/cybersecurity/403148-dhs-chief-calls-on-election-officials-in-all-50-states-to-have

Failure of states to comply opens up many possibilities.