Unintended consequences

Tell people not to panic and, of course, they will. From the Evening News (here):

"PANICKING motorists today besieged petrol stations across the Capital fearing threatened blockades of oil refineries would leave them with no fuel. There were scenes of chaos as drivers began queuing even before petrol stations opened at 7am.
Petrol suppliers said they hoped to be able to keep up with demand today - but warned they would have to rely on getting through new deliveries if the situation continued.
The panic-buying came as Chancellor Gordon Brown urged the world's oil producers to increase their output to curb soaring prices.
Hauliers and the Tories accused Mr Brown of being out of touch with the scale of the problem facing families and businesses. They demanded immediate cuts in tax to bring prices down.
There were massive queues at petrol stations and supermarket forecourts across the city today...
Phil Flanders, director of the Road Haulage Association in Scotland, appealed to motorists not
to panic buy. He said: "It's a bit ironic that some petrol stations are going to run out of fuel and then hauliers are not going to be able to fill up. There is no need for panic buying. Most people don't do huge mileages and this just causes total chaos. If everyone just does what they normally do things will be fine."