A common mistake that people make when trying to design something completely foolproof is to underestimate the ingenuity of complete fools.
Douglas AdamsMy capacity for happiness," he added, "you could fit into a matchbox without taking out the matches first
Douglas AdamsArthur felt happy. He was terribly pleased that the day was for once working out so much according to plan. Only twenty minutes ago he had decided he would go mad, and now here he was already chasing a Chesterfield sofa across the fields of prehistoric Earth.
Douglas Adams