Wed 29 April 2009, The Guardian

Plane Stupid campaigners shouldn't whinge about police infiltration - it's a sign of their success

By Marcel Berlins
I am not in the least surprised or shocked that the police attempted to turn Matilda Gifford and others from the Plane Stupid campaign into informants. I am, though, surprised at the surprise of others that the police should be doing such things. Insinuating someone into an organisation in order to reveal its secrets - whether a police spy from the start, or a genuine member bribed, threatened, blackmailed or even persuaded by the force of argument - is an ancient police practice and very often a successful one.
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