> Who uses a pencil to cast their vote? Use a pen!!!! You can't rub out a pen.
If you are planning to subvert an election by changing the votes, do you:
(A) Open up the ballot box, pull out an eraser, carefully rub off all the marks, then renumber them according to your evil plans; or
(B) Print out new ballot forms and then number them according to your evil plans;
(In both cases you need to figure out how to stuff those faked ballots into the box).