David Cameron demonstrated a fundamental misunderstanding of how the internet works today when he waded in to the debate about beheadings on Facebook.
In a tweet that touched on responsibility, worried parents and extreme violence, the PM laid the blame of posting violent videos squarely on the shoulders of the social media site.
Only Facebook don't post videos, it's users do.
His technological faux pas was quickly seized upon:
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The implications of the tweet were shared:
Then his apparent double standards on child pornography was made an issue:
Then the sincerity of his tweet was called into question:
So to sum up: