Is there a word for this kind of "irony", when things purposefully built to deter something fail so spectacularily that they work against their own goals? "The

Is there a word for this kind of "irony", when things purposefully built to deter something fail so spectacularily that they work against their own goals? "The crows used the anti-bird spikes as a sturdy construction material, but the magpies may have appreciated their intended use: they placed most of the spikes on the nest’s roof where they could deter predators, including other birds and weasels. (...)In 1933, a South African museum reported a crow’s nest fashioned from hard-drawn copper, galvanised iron and barbed wire. Nails, screws and even drug users’ syringes have all found their way into birds’ nests. (...)Rather than finding old strips of anti-bird spikes at rubbish dumps, Moeliker, who previously won an Ig Nobel prize for documenting the first known case of homosexual necrophilia among ducks, says crows and magpies appear to be finding and removing the metal strips from buildings. “They are ripping the stuff off. It’s been observed in several kinds of birds,” he said."