Messages usually exploit this by mentioning how "XYZ warning" is according to scientists at NASA/MIT/IIT. My parents - who are both in their 70s - believe that these messages actually originated from NASA/MIT, etc.
I don't know how to fight this. I've tried explaining it to my parents yet they don't get it.
I can't even imagine how hard it would be to dispel these myths and beliefs among uneducated people.