Approach it like this: think about counting to 100. Benford’s Law basically just talks about how often each first digit appears. So as you count, keep nine separate tallies; each time a number starts with “1” (such as 11, 15, 122, etc.) you make a tally mark in the “ones” column. Same for “twos,” etc.
Let’s count to 3 first. One tally mark in the ones column, twos column, and threes column, but no tally marks in the fours through nines columns. We see that 1 appeared the most often (but was tied with 2 and 3, which also appeared a single time).
If we count to 10, then “1” appears as first digit twice, and all the other columns only get one tally mark. So 1 appeared most often but everything else was tied for second place.
Now count to 20. The numbers 10 through 19 all result in tally marks for the “ones column”; altogether, you get eleven tally marks in the ones column. There are two tally marks in the twos column (for “2” and “20”). Every other column only gets one tally mark. So the ones column is in first place (has the most tally marks), the twos column is in second place, and all the other columns are tied for third place.
See the pattern? You can do this out to 100 if you want. The smaller the digit, the more often it appears.
If a sloppy cheater makes up numbers without thinking of Benford’s Law, the numbers will seem “random”/“natural”, but further scrutiny will reveal that they are fishy/improbable. So let’s just pick the numbers 27358, 524, 18327, 937, etc. These look “random”/“natural” to the cheater. The key oversight is that the cheater doesn’t think about how “natural” the SET OF NUMBERS is. So 524 and 5673 look “natural” individually, but taken together you have an improbably high frequency of “5” as the first digit.
Honestly, I’ve never used FaceID, so maybe the technology just isn’t there, but here’s the basic concept that still applies: you are signing with a photograph at the polling station. It’s harder to impersonate a face than a written signature (when the person checking the signature is just some poll worker who doesn’t care or is corrupt).
(The joke is mostly about how if people are able to go to a polling station they are able to get an ID; I just combined those two processes together; I thought the title “Voter EyeRee” would clue people into it being more of a joke than a formal proposal; but I don’t know, maybe there could be a non-terrible way to implement something like this.)