Next time you get one of these calls

My principal called me on a private number to tell me something important so now I'm too scared to try this. XD

*mum rings on a different phone* "honey, my phone went flat so-" "It's done, but there's blood everywhere." "JEREMY? WHAT HAVE YOU BEEN DOING? GET HOME RIGHT NOW!"

Your number would be given to the cops

I never answer blocked or unknown numbers.
If it's important enough to call me and important enough I know right now, they are important enough that I know who they are already.
All others get voice mail.