The important question for us as Christians is generally, who is baptized, not so much how. I think the thing that protects the shape of the church is that it is believers who are each a member of the church. We are the ones who've been baptized and come to the Lord's table regula...
as travail upon a woman with child; and they shall not escape. But ye, brethren, are not in darkness, that that day should overtake you as a thief. Ye are all the children of light, and the children of the day: we are not of the night, nor of darkness. Therefore let us not sle...