Worst computer user interface of the week: SBS Dateline

SBS Dateline have an email service to tell you what is on the show each week. I went to unsubscribe from this service and was confronted by a very confusing web form. It only has one tick box and one button. But the instructions use negatives. It would be a lot simpler to have a box you tick to be removed from the mailing list, than one you untick to unsubscribe:

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(Please untick) I would like to unsubscribe from the Dateline Newsletter.