Parent:Child association change !!!!!

I absolutely could not believe it when I read the following:

Issue Number    119751
Type    Problem
Severity    S2 - Urgent
Status    Closed - As Designed
SLT Age    0 Months
Release Target    Mar 2007 SLT



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Abstract: Lists > Relationships > Customers > Edit Customer record to add a Parent > 'Child Of' field is disabled.

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Details:
Customers with transaction history may no longer be assigned to a different parent customer in the 'Child Of' field, when the 'Accept Payments Through Top-Level Customer' preference is enabled.

This protects users' A/R data integrity. If there are payments associated with a parent customer, that are applied against a sub-customer's invoices, then changing the parent customer on that sub-customer would cause significant issues- invoices would no longer appear paid, the former parent and sub-customers' A/R balances would not be accurate, etc.'