According to a recent Neuromarketing post, the worst way to respond to an allegation about your product is by referring to it in order to refute it; that repeating allegations only reinforces their existence in people’s minds – and in some cases, presumably, introduces the rumour as new information.
By this reasoning, are the current Maestro adverts (aimed at getting people to use cards instead of cash) more likely to remind people to withdraw cash than to stop using it?