Yes, however, I’m not taking the risk that I don’t have hands on my phone if shit ever hit the fan. And in any hectic situation people might not remember “lockdown”. Definitely, not as simple as you think.
In the U.S., you do not want to use face unlock for your cellphone. It’s not protected by the 5th amendment. Law enforcement can get into your phone without a warrant.
Yes, however, I’m not taking the risk that I don’t have hands on my phone if shit ever hit the fan. And in any hectic situation people might not remember “lockdown”. Definitely, not as simple as you think.