[PichlerD]

This wouldn't take place on the Bitcoin Blockchain, at least not in an on-chain manner as it would be way to slow and costly.

Voting itself comes in different forms. If you mean voting for a head of state to curb election fraud I could imagine this (for now) to be done in a more traditional way.

1) You go to vote in a normal voting booth 2) In the booth you have an offline computer, allowing you to pick a candidate and create a hash on a flash drive. 3) You enter the drive into an online computer infront of the voting scrutineers and the transaction is pushed to a blockchain.

The advantage of such a system might be that you can verify that your vote was counted by keeping the public key, while on the other hand it avoids vote selling if it makes sure that you can't check again who was voted for in the transaction.