You should always provide people with your correct address.
Asher is checking out at the cash register when the cashier offers him a discount if he signs the form to join their mailing list.
Asher wants to get the discount.
Asher fills out the form while making sure that all the fields, including the address, are filled out correctly.
Feeling like the information being asked is violating his privacy, Asher enters an old address on the form that is no longer valid.
Asher receives a lot of promotions and catalogs from the company in the mail.
Asher doesn't receive any of the coupons that are sent to him and misses out on some significant discounts.