This dedication concept as a pre-requisite for baptism is not a New Testament teaching. If you look at all the baptisms in the book of Acts (both Jews & Greeks), it makes no mention of some vow (add study program, ministry school, 100+ baptism questions) prior to emersion. And Romans 12:1 is addressing 'brothers'. It sounds good and feels good to many, giving them a sense of duty or acomplishment, but I just don't see it. (there is a greek work for dedication) If it was such an important tenet of Christianity it would be explicit. To me, making this vow and 'living up to it' is NOT the plan of salvation. It takes away from the value of what Christ died for, making it a 'down payment' as it were substituting works for faith.
Seems the leadership also frequently confuses the word covenant with dedication. they are not synonymous last I checked, The Jews were under the Mosiac Law Covenant, not the Mosiac Law Dedication.
I suppose they have no fear of standing before the judgement seat of Christ since they feel THEY are the Christ too. They're in for a sad awakening.