It is impossible to verify those warnings, and there is no way to know if the person(s) making the claim are doing it because it's valid, or because they're getting publicity or money out of it.
I don't believe in popular prophets. Period. There are too many charlatans out there for me to trust what any 'prophet' on the Internet is claiming is from God. I rely on God's word alone, and the Holy Spirit's guidance to see if what others say lines up with what is in the word.
I'm sorry, but we will have to agree to disagree on this, and I'd rather not continue this discussion. Please?