The Bible tells us to judge those words. If the word is not in agreement with the Bible then yes, it is dangerous if we are so foolish as to not judge and test the spirits as the Bible tells us to do. If we have done that, we know it is not from God and walk away as I have done many times. I have heard many words that I do not trust to be of God. I'm not going to throw away what God wants for me just because people try to get in the way. People will do that. People have their own motives. Some like to manipulate others with words they say are from God. Some like to puff themselves up etc. I am not scared of what is really from God. He wants me to receive from Him.
You can spend all day posting articles written by men on the sufficiency of the Bible if you want to. It's too bad they do not really believe that the Bible is sufficient enough believe it! You are the one that is deceived in this regard. Sadly, you are the one who is swaying people into deception in this area. I want people to receive all that the Lord has for them even if you do not approve.