In one sense it is shocking, and yet it is not altogether suprising to me.
Jesus said, "And why call ye me, Lord, Lord, and do not the things which I say? Whosoever cometh to me, and heareth my sayings, and doeth them..." [Luke 6:46]
Many, many people who "join in the prayer" have no genuine comprehension of their heinous crime against God's holiness, their radical need of salvation, or the honest intention of obeying more than a moral code.
I believe that a man cannot be saved who does not acknowledge that he needs to be
[i]altogether saved[/i]; which is to say, he must know that literally nothing good dwells in him, that is, in his flesh prior to Christ. (Rom 7)
Yet, I myself "accepted Christ" while for years maintaining in my heart that I was not altogether wretched. As well, I thought repentance was feeling bad when I sinned, feeling bad for "making Jesus have to die"; I thought repentance was paying back good deeds, itself, rather than the heart that is changed. My understanding is that repentance occurs when a man cooperates with God, who Himself produces a heart that takes sides with God completely, totally, and finally against self and world.