He that committeth sin is of the DEVIL; for the DEVIL sinneth from the beginning. For this purpose the Son of God was manifested, that he might destroy the works of the DEVIL. - I John 3:8 (KJV)

This one could be said of the designers of these t-shirts:

Ye are of your father the DEVIL, and the lusts of your father ye will do. He was a murderer from the beginning, and abode not in the truth, because there is no truth in him. When he speaketh a lie, he speaketh of his own: for he is a liar, and the father of it. - John 8:44 (KJV)

THE DEVIL IS THE FATHER OF LIES!