This reminds of an outcome that makes your system vulnerable to data theft. Following the above steps, anyone having physical access to the device by any means (which is more likely in case of mobile devices), could gain root access and do whatever one wants to do with the system as well as the data. One solution suggested to me was to set a BIOS password. That's good.
I would like to know that is there any way once you forget your BIOS password. Regards Himanshu Shekhar