Re: open votes please!
"They can't, because there are too many people on the other sides (parties) who don't want them to do it."
Unless they really AREN'T and they're actually in cahoots.
"Swapping one box of physical ballots is probably feasible. Swapping enough boxes to make a meaningful difference is effectively impossible."
A hotly-contested election would mean only one or two would suffice. As for more boxes, never underestimate the scope of major political parties.