What the feds wish "locked phone" meant

from here and here (image source)

There are so many things wrong with this technique. If someone wants the actual hardware they can just wait until you're about to use it to actually snatch it - that is assuming you can't just unsnap it from the belt (although it sort of looks like you can). It doesn't protect against any other kind of threat except phone thieves. Of course there's also the inconvenience of having to fumble around with a cumbersome lock whenever an incoming call comes in. How many missed calls before you start not locking it at all?