How exactly would that be abused? Denmark have a website where you can enter any address, or an address close to where you want to be and then let you select th

How exactly would that be abused? Denmark have a website where you can enter any address, or an address close to where you want to be and then let you select the right house on a map. The same site will show you the owners, the purchase price the taxable value, size, number of bathrooms, stuff like that. I used it to find the address of a friend when I needed to ship him a present and I only roughly knew where he lives.