Even assuming 1 person could make it through 10-20 precincts per day, you're going to need thousands of attackers to change even a close national election. Coo

Even assuming 1 person could make it through 10-20 precincts per day, you're going to need thousands of attackers to change even a close national election. Coordination on that scale is completely impossible to pull off without detection. This just isn't a feasible attack.