Is it morally wrong to kill purely for fun?

[Treedbear]

Killing flies and many other disease carriers is a virtue in many circumstances. Killing all flies everywhere is not. It would in fact be immoral.

It is a virtue to kill flies in many circumstances, a virtue and a necessity for us. The flies that are being killed may have a different perspective.

We have the same perspective with regard to survival. To them the few humans who die from malaria are collateral damage.