I agree it would be a BAD practice to update an address based on a credit report.
A few years ago, husband and I were talked into applying for a store card (20% off a $400 purchase...) and the gal's printing was so sloppy that the "7" in our address got reported as a "1". Our bill went to a neighbor down the street (thank goodness an honest one who notified the postal carrier) and THEN a bunch of pre-approved credit card offers went to that same address. That was nightmare enough to get fixed - imagine if my other credit accounts changed the address also, and the neighbor was less than honest.
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CRCM,CAMS
Regulations are a poor substitute for ethics.
Just sayin'