I'm just a simple YouTube comic, but I have to say: this is very wrong.

First of all, the Good Thief (Dismas), committed THREE of the Spiritual Acts of Mercy:

1) Admonishing the sinner, "But the other answering, rebuked him, saying: Neither dost thou fear God, seeing thou art condemned under the same condemnation?"

2) Instructing the ignorant, "this man hath done no evil."

And,

3) Comforting the afflicted, by his demeanor toward the suffering Christ.

Next, the Good Thief took part in the Sacrament of Confession, to the High Priest, Jesus Christ. "And we indeed justly, for we receive the due reward of our deeds,"

The Good Thief also confessed Christ as Lord, "And he said to Jesus: Lord, remember me when thou shalt come into thy kingdom."

Finally, Dismas WAS baptized. As he hung on Christ's right side, he was baptized in the Holy Blood and Water, that gushed from that same side of Christ, when it was pierced by the Centurion's lance.