doing business

i just read an article about business and the like still sending junk mail and other mail to the world trade center. it has been five years, and the big business of "selling an address" is still focused on making money. i find this hard to grasp - now, i would think removing the world trade center from a data base would be hard if the trade center was "mixed in" with all the other local stuff - but the trade center had its own zip code - 10048. removing them from the data base would be simple, a few button and just a bit of time - but that would also mean the companies selling the bulk mail information would make less money - sounds like a case were "capitalism" is over caring.