“Who’s saying it?”

That’s a question which should be asked a lot more. Followed by: “What does this person know?” and “What’s his/her record for being right?” [Especially if it’s some alleged financial genius like G. Osborne or the Gov. of the BoE]
    If the answer to the primary question is “Some anonymous troll on the internet” or “a known enemy of the person being trolled”, then there’s no reason to go on to further questions, which would save a lot of time if the rule is applied ruthlessly enough. Although, the BBC might have to cope with lots of silences and newspapers would have to publish lots more ‘news’ stories about stars no one has heard of.