It's probably due to the internet and the speed with which bad information is generated and consumed and regurgitated. After a short time, the bad information pops up everywhere and, thus, become verifiable.
I don't think that it's done intentionally. It seems to me that these people actually believe what they say is true. They seem to not know that they don't know what they're talking about. And why not. Ignorance is bliss. They're not hurting anybody, right? If someone says that the sun goes round the earth, then why not? Why can't they be happy in their world? Just be thankful you're well informed enough to not be affected negatively by it and enjoy your day.