One of the frequent struggles with Fitbit One users is the loss of the device. If you drop your fitbit while running in a trail or at the mall, the chances of your getting the Fitbit back are effectively none. Even if the fitbit was found and the finder knew what it was, there is no means to unite it back with its owner.
How difficult would it be to update the fitbit to display an "IF FOUND" message along with the rest of the information? It would work like the silent alarm, if you see the "IF FOUND" and continue to click through, then you won't see the remainder of the message. If you see the "IF FOUND" and stop, you'll see the remainder of the message. I used the greeting to mock it up, and it'd look something like this:

You'll still be at the mercy of the finder, but I think most folks who found the device would be willing to return it, turn it in to the local 'lost & found', or both. I'd probably do both, "Hey, I found your fitbit at Subway, leaving it with the cashier."
If nothing else, at least expand the greeting to accomodate more than 8 characters, possibly 14 characters to accomodate area code & phone number: (XXX) XXX-XXXX
-Frank.
Frank | Washington, USA
Fitbit One, Ionic, Charge 2, Alta HR, Blaze, Surge, Flex, Flex 2, Zip, Ultra, Flyer, Aria, Aria 2 - Windows 10, Windows Phone
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