Is It Okay For Protestants To Pray The Rosary?

The Rosary is a necklace with many beads on it and it has a crucifix down at the very bottom. But far from being a mere fashion accessory for Christians, the rosary is actually a tool used by Roman Catholics in prayer. Catholics run their fingers across the beads to count the prayers which comprise a rosary prayer session. There are, to my knowledge, two types of rosary prayer: "The Rosary" and "The Divine Mercy". The former consists of many Hail Marys that run across the "decade" beads (i.e...