They created illusions of armies and battleships and masked the Suez Canal to such effect that confused Nazi bombers dropped their payloads off-target.
In effect, the bank now has a target range for short-term rates: the upper bound is the 1% refi rate and the lower bound is the rate the central bank pays on banks' deposits with it, currently 0.25%.
"Social networks are about connecting people with other people - if one person is the target of police monitoring, there will be a dragnet effect in which dozens, even hundreds, of innocent users also come under surveillance, " said Gus Hosein, the group's executive director.