I don't know. I would be very tempted to use it, but a large part of me would ask: why do I have the right?
I would be tempted to use it on politicians, because they're all evil, and people who are extremely stupid. That last part probably sounds horrible, but many of these individuals are blights on society in every way, and deserve a painless death a hundred times over.
However, not only would I ask myself: what gives me the right? I would also be horrified that I might be 'corrupted' by the power. That last part would likely give me pause, and I would probably keep it for a time when using it seemed more appropriate.