If you genuinely believe there is even a 1% chance that your creation could destroy the planet or civilization, there is no excuse that is not fundamentally deranged and psychotic.
If you can't build it and test it securely, you should not be building it at all. To do it anyway is criminally psychopathic.
If you can't build it and test it securely, you should not be building it at all. To do it anyway is criminally psychopathic.