A friend of mine says he no longer kills cockroaches (he 's also stopped playing shogi, the Japanese version of chess, as he no longer wants to compete with and defeat others). He feels sorry for them, and instead catches them and places them outside.Of course, he lives out in the country surrounded by rice fields, where he has an advantage I will never have a resident Huntsman spider in his back garden, nearly ten centimetres across, who takes care of any cockroaches it comes across.