Since Apple introduced the great Block Activation in iOS 7, thieves and dishonest worldwide try to find ways to circumvent the protection to achieve activate stolen devices. But a flaw in the system is allowing this to be possible, quite easy.
We do not usually comment on security issues here in the BDI, but in this case, we find it best to warn everyone to avoid until Apple solves this problem.
The failure is serious, but needs full access to the device, ie, those who usually use password is protected.
Someone (somehow) discovered that it is possible to delete an iCloud account from a device simply by turning it off when it is prompted for the password. See the video to understand better:
As this fault is being widespread on the Internet, information is spreading very fast. So it is best to prevent adopting a password for the device, at least until this problem is solved.