[ianferrel]

Hasn't that ship sailed?

We're all carrying cameras into the voting booth.

[brassic]

Here in the UK you can ask for a replacement ballot paper if you make a mistake.

So you vote for candidate A, photograph it, swap it for a replacement ballot, vote for B, photograph it, etc. and get paid by all the candidates.

Except the candidates know that a photo of a ballot paper proves nothing.

[pjc50]

Yes, although (in the UK) it's an offence to photograph your ballot paper and the voting privacy screens are pretty minimal.