Most of the things spread against Roman Catholics are lies and misconceptions. I saw this website called Jesus-is-saviour.com it shows an uneducated person's blog which shows symbols being used against the Catholic Church, both Eastern and Western.
The Skull and Bones
Adam or, more likely, in reference to the New Testament statement (King James Version: Matthew 27:33, Mark 15:22, and John 19:17) that the place of his crucifixion was called "Golgotha" (tr. "the Place of a Skull"). The skull under Christ's foot symbolizes Christ's triumph over death. Not as a masonic symbol. Another symbol is the All seeing eye of God.