Nothing, it is the right thing to do.
But it should also be done because of the right reasons, not just to "pad" the church rolls like Finney was doing.
One of the last things Jesus instructed the disciples to do was to out into the world and "teach".
"Go ye therefore, and teach all nations, baptizing them in the name of the Father, and of the Son, and of the Holy Ghost:" -Mt. 28:19 (KJV)
"
poreuqenteV oun maqhteusate panta ta eqnh, baptizonteV autouV eiV to onoma tou patroV kai tou uiou kai tou agiou pneumatoV," -Mt. 28:19 (GNT)
"
maqhteuw,
v \{math-ayt-yoo'-o}
[SIZE=-1]1) to be a disciple of one 1a) to follow his precepts and instructions 2) to make a disciple 2a) to teach, instruct [/SIZE]"
Greek Lexicon
He was so worried about getting people to the altar, he forgot to teach, instruct, to actually make them disciples of Christ.
But what the hey, like you said, if 25,000 of his estimated 500,000 stay converted, the end fit the means right?
Get them to the altar by "hook-or-crook".
Just like Finney, get them to come up, make a confession, and after that, your on your own.
Sinners Bound To Change Their Own Hearts
Turly a man to be admired.
God Bless
Till all are one.