Hi DJI
It would be nice and safe if the smart controller firmware would be updatede with option for security lock (PIN) just like mobilfone.
Regards from sunny Denmark

Hi there. Thank you for reaching out. I will take this as a suggestion of yours and will forward it to our designated team for attention. After the evaluation of the engineers, significant suggestions or requests will be implemented via the firmware update, app update, etc. For any updates, please stay tuned to the latest news on our DJI official website at www.dji.com. Thank you for your support!

+! great idea.    It would be nice if this pin was also needed to factory reset it too.

This is a good idea to deter muggings and theft. Just a 4 digit pin code would be fab.