Check almost any CofC congregation in the state of Indiana to find out their own requirements for membership, and what their history of outreach is.
Ought to be an interesting trip for you.
And beware of churches who formerly had a very New England Puritan structure (and belief) and have now renamed themselves CofC.
The CofC with which you are familiar in the Souf' is barely representative of a third of the CofC congregations in this country.
Your narrowmindedness and provincialism is not evidence of ignorance on the part of others, or of lies.
More of your ignorance (and regional bigotry) on display. My older brother has preached for a total of about 20 years at 3 congregations in different parts of Indiana, and I am familiar with a few others there as well. Somehow this vast majority of churches of Christ that you describe has remained secret. Are they located underground?