Old movies about Atlantis show this kind of device, even though the movie-makers had no idea that the thing they portrayed could actually work like they suggested. If such a laser can rip holes in space, parallel universe theory suggests that they will only be ripping into other universes this way. The dangers are immense, beyond the dangers of the hydrogen bomb. They don't know what they are playing with, just like some of the things of CERN are extremely dangerous in a different way.