Your first example (with lightning) takes place in Dragonball.
Heck, even if you don't take that example, look at any other episode in Dragonball. How in the world did the Moon get blown up so many times without any ill effects?! And that happened in the DBZ Universe...
How is this relevant ? Do YOU know what would happen if the moon blew up, or would just guess based on all the theories lingering over the internet.
Because one I found was that there would be very little effect aside from a change in some of the tides times and distances, resulting in some minor coastal changes. The same theory stated that nocturnal creatures would have to evolve, as they rely on the moon to know when to hunt.
What happened to the wolf man in dragonball. He became stuck as a wolf.