Since this is about finding discs, a LE Officer will never arrest some one for not returning a found disc. So the stealing a pack of gum isn't even a true comparison.
A grocery store employee or a good Samaritan would need to alert a LE Officer to the pack of gum that is being stolen.
Likewise, a park employee or a good Samaritan would need to alert the LE Officer that someone is stealing a disc.
Either way, the LE Officer may ask for proof of purchase/confirmation of ownership. If the name and phone number on the disc do not match the person holding the disc, we are still talking about a theft. Would it really be that difficult to call the number on the disc? If the person's cell phone starts to ring...that would probably be good enough for any LE Officer to confirm proof of ownership.
Don't forget....at the end of the day, all of this may be considered a moot point if people applied the simple, yet important lessons learned in kindergarten. :thmbup: