Re: It's total bollocks
A ballot box swap should be trivial to detect by any number of measures:
1) Never having a ballot box anywhere except in plain sight of at least 2 people, and as many people as want to watch it
2) Keeping track of which ballot papers are issued to which station, through colour, serial number, shape, randomisation of candidate ordering etc. etc.
3) Stick a big tamper resistant location label on the side
4) Chain it to the floor, or the van, or the nice policemen who are here to ensure there's no jiggery pokery with the ballot
and so on and so forth.
Paper voting: it just works.