The Metropolitan Police have started a poster campaign designed to either (a) alert people to their Anti-Terrorism Hotline or (b) whip up unjustified fear in the populace and encourage people to grass on their innocent neighbours, depending on how you look at it. Boing Boing pointed out the horrid nature of this and then started a poster remix campaign, and now remixing is easier. Edit the poster above by clicking on the text, and then hit the button to get a link that you can send to people.
Poster picture: "Chemicals" "CCTV"
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built by Stuart Langridge, kryogenix.org, and imagery generator built by Alex K