This is kind of scary: Weather control for political purposes.
Thirty-two thousand people are employed by the People's Republic of China in their weather control program. The operation costs up to ninety-million dollars and members are equipped with everything ranging from rocket launchers to modified anti-aircraft guns.
The small army influences the weather for more reasons than just to alleviate drought. Everything from firefighting to having the perfect conditions for the Olympics are now being influenced by Chinese efforts.
An interesting question for the future is concerns the "right" of countries to make it rain. The moisture that is being prematurely forced into rain could have become rain for South Korea, Japan, Taiwan, etc. A whole slew of problems from water access to denying rain for political purposes to others are just some potential things which may lie in the future.
Not to mention how changing the weather locally affects weather and climate in a more global sense. And there’s the health issue of constantly releasing silver iodide into the air.