Well and truly stated ... and you have focused upon yet another reason why the Catholic claim is in error. What would be ‘guilty of the blood and flesh of the crucified Lord’ as a negative, if eating His real flesh and blood was what was being taught? How is it a negative to be guilty of that act if the act is what is being asserted? ... THE BIBLE is clear that cannibalizing and eating the blood of the creature is forbidden, and has been so since long before the law was given through Moses! So to be guilty of the cannibalizing and taking of blood is obviously not what GOD is calling us to do! For if we eat the bread and drink the wine unworthily, we are then guilty of cannibalizing and eating blood! Sadly, Catholic trained minds are unable to see that glaring contradiction facing them in Paul’s teaching. They want the secret pride of fidelity to the institution’s sacramental system. THAT is anathema to the Gospel of God’s Grace in Christ Jesus.
Well it was not my intention to get into “cannibalism and Catholicism” question. I think if we take the Lords supper unworthily, whether it be in a ‘ho hum manner” or with unconfessed sin in our lives, Paul is saying “in a sense” then we are guilty of simple cannibalism(which is the sin you are speaking of, especially taking of the blood), being “guilty of the body and blood of Christ”, but if we partake of it in a reverent manner, mindful of his sacrifice for us then we receive the blessing of the act from the Lord. Now I am not saying we are “resaved” everytime we take the bread and cup(which is my quibble with some Catholics)!