If I wanted to send a message I would take over the television transmissions
Then everyone would get the message, at least by doing that there would be some creditability to my message
Anyone can stick a message on youtube claiming to be anything they can dream of.
I could post a message on youtube claiming to be god and anyone that disbelieves me will go to hell, that would be a lie and there probably is someone saying just that but that's how easy it is to do