We need to understand why, when, and how it was that Paul said it wasn't necessary.
Lev 17:11 For the life of the flesh is in the blood, and I have given it to you on the altar to make atonement for your souls; for it is the blood by reason of the life that makes atonement.’ (NASB)
We remember the scripture that it isn't what goes in our mouths, but something much more.
Heb 4:12 For the word of God is living and active and sharper than any two-edged sword, and piercing as far as the division of soul and spirit, of both joints and marrow, and able to judge the thoughts and intentions of the heart. (NASB)
I think your judgments on the people who learn these things WILL cause your death.
1 Cor 14:37 If anyone thinks he is a prophet or spiritual, let him recognize that the things which I write to you are the Lord’s commandment. (NASB)