That's what happened in Japan, those folks have been dealing with tsunami warnings their whole life with nothing extraordinary happening until this year. I'm sure they were sittin' in their houses, bars, or boats when they heard that siren and stayed put cause they had been conditioned into a false sense of security. Poor them. Sorry to highjack, but if i were born in Japan, a tiny island, knowing it sat near a major fault line, I'm not so sure I would have felt comfortable not moving somewhere else far away. But yeah, if a tornado like the one that recently tore through Mississippi and Alabama came back for seconds, I would want every siren blasting as long and as loud as possible for as many to hear. Just stick with better-safe-than-sorry mentality. They are sounding them for thunderstorms now because they help fuel the tornadoes that have hit recently which were so sporadic and unpredictable. That is all.