This is the same thing as the Mormonism thread: A false gospel is a false gospel and a misled individual is a misled individual. Anything not of God is, quite simply, evil because it is not of Him. If a Catholic truly believes that he or she is saved through Christ and heeds the Word of God, then they are a Follower of Christ. I personally find Catholicism to be quite worldly and I'd argue that some of their rituals are borderline idolatry (Note: It's my view of the Catholic Church as an entity, I am not trying to infuriate anybody. I dislike the concept of denominations to begin with.), but I've no doubt that there are Christians within the ranks simply because they do utilize God's Word and they do portray Jesus as Lord and Savior, as He truly is.
It doesn't matter what organization or religion: If they do not teach God's Word and Salvation through Christ, they are misleading their followers. Catholicism, Mormonism, Islam, Ice-Creamism, whatever.