For example, in this article from www.catholic.com, the author admits that Catholics regularly bow to statues; he just tries to separate the bowing from worship:
Sometimes anti-Catholics cite Deuteronomy 5:9, where God said concerning idols, "You shall not bow down to them." Since many Catholics sometimes bow or kneel in front of statues of Jesus and the saints, anti-Catholics confuse the legitimate veneration of a sacred image with the sin of idolatry.Of course, the author misses the point: God does not specifically forbid bowing down to a living person, like a king, in respect--but He does forbid doing so to an inanimate object, and calls it idolatry. All the justifications in the world (and we've seen a lot of them on this thread) don't change that fact.Though bowing can be used as a posture in worship, not all bowing is worship. In Japan, people show respect by bowing in greeting (the equivalent of the Western handshake). Similarly, a person can kneel before a king without worshipping him as a god. In the same way, a Catholic who may kneel in front of a statue while praying isnt worshipping the statue or even praying to it, any more than the Protestant who kneels with a Bible in his hands when praying is worshipping the Bible or praying to it.