Re: Joining Petition requires more ID than actual Referendum Vote
Actually. no. The referendum is self-checking. If you turn up at a polling station and claim to be someone who has already voted, you or the prior voter are lying and it will be completely obvious if there is a large amount of electoral fraud taking place. Whereas with the online petition, I wouldn't ever know if somebody has cast a vote on my behalf. It's not as if my e-mail address is permanently registered and immutable, and there are plenty of older voters who don't have e-mail addresses at all.
(Which also makes such online polls a biassed sample of the electorate; how do you find out about such a poll? Obviously, 100% of political activists will know ...).
Also it's a bit silly that one cannot cast a negative vote. There have been several polls that I'd have liked to downvote, but only El Reg provides that facility.