Key set available for $150 on eBay provides an all-access pass to NYC
nypost.com
nypost.com
(Anyone wanting to get into these locks could pick them in 30 seconds. Locks are for keeping honest people out, not for defending against terrorists. Terrorists with 767s don't need keys to anything. Occupy Wall Street protesters that want to shut down a bank's elevator system will still have to get past security to get to the elevator control panel.)
Ironically, the so-called master key only appears to have four pins, two fewer than my apartment. The locks these keys unlock are designed to be secured by other means.
Not that it really matters since keys have been and pretty much always were security theatre from the very beginning.
I suspect they'll be seeing a bit more foot traffic in the future.
Now the entire internet has pictures of the profile of the key, simply buy some blanks, enlarge the photo til it prints the same size as the blank, and then file the blank to match the profile of the key.
There is always a compromise between security and usability. And for almost all systems, practical usability is mandatory, but security is nice-to-have - it's completely enough to deter nonserious attackers such as the majority of drunken vandals.