[dcdc123]

It was because a method was discovered to bypass the lockout of stolen devices.

[userbinator]

In other words the same old boogeyman they always use to justify this crap.

[dcdc123]

From what I understand this does not prevent use of custom ROMs, it just means ROMs built before it was done will not work anymore. I assume they can re-package old versions to work with the new configuration, I am not entirely sure though. There are discussions elsewhere in this thread with more informed people.