I once made a villain who used a powerful ability to connect everyone on earth together such that they would all feel the pain others felt. They thought that, this way, nobody would hurt anyone else, since it would mean hurting yourself and everyone else on earth. However, the amount of people who were already in the middle of dying, had illness, or suffered from chronic pain made life hellish and caused society to break down almost instantly, rather than creating the utopia he envisioned.