A few thoughts:
- Baptism is an outward indication of an inward consecration. That being the case, if your heart wasn't in it at the time, the only thing your baptism did was get you wet. A "debaptism", then, is nothing more than a public renouncement of church affiliation, which I guess is the point.
- I've never been a big fan of infant baptism. I think it's okay as a ceremony where the parents commit themsevles to training the child up in the faith, but not as an indication of saving faith. I mean, come on . . . experience has proven that a baby's brain is nothing more than one big drool-and-poop gland - can we really assert that the child has weighed the course of his life and decided to accept Jesus as his Savior?
- If a person "gets saved" at one point in his life and later wishes to recant, was he ever really saved to begin with? This is the classic "once saved always saved" issue that has divided Christians for centuries. For passages supporting both sides of the issue see John 10:27-29 and Hebrews 6:4-6.