[Q] A very strange Question topic

Okay Guys, i have a very strange Question.

My Device is the Sony Xperia Z2

Can i prepare my device in a way so that i can not Root it anymore. Can not flash any Custom Rom or open the Bootloader again ?!

My idea was to use "fastboot oem lock" and then delete my unlock Key... Will this work ?

:eek:

Sorry for my bad English