Lock Screen contact information

Ok so I was reading this while editing my lock screen and noticed something funny. It suggested you put in your phone number or email so you can be contacted in case you lose your phone. Wouldn't it be smarter to suggest an ALTERNATE phone number? How can someone call your phone number and tell you they found your phone if the number they call...IS YOUR ACTUAL PHONE!?

I did this awhile ago and thought hmmm...that's kinda not to bright so I put in my wifes phone number so that if I lost my phone...I could actually get a call letting me know. 

Just food for thought 🙂