We're not telling you rain water's important. We're just saying IT'S TIME TO PANIC SHOP!!!!!
Let's be clear: there's NO proof that black helicopters are hovering the water supplies of small towns very much like yours. And there's ZERO evidence that specially-trained polar bears are being moved toward bottling plants in an attempt to control bottled water. And NOBODY would say that the government has developed miniaturization rays and used them on special agents who are just the right size to clog your garden hose, let alone that those tiny agents are carrying itty bitty buckets which they'll use to give your water to powerful corporations who'll then try to sell it back to you for black market Ameros.
But what they MIGHT say is "Hey, have you ever considered a rain barrel?" You know, just conversationally. For no real reason. Just folks talkin' about stuff.