Come, stay, chips, they are all great until they don't work. Any dog is capable of running after something that is just too much to resist, and mine recently snuck out the door and ran next door to see his friends. He just kept banging on the screen door till it let go.
A tag is something anyone can read and call the number. Ruger's has his name on it and my number. Sure, if he gets away and someone decides to steal him there isn't much I can do about it, but most people around here read tags and call the owner, and it's pretty rare when he gets away from me.
It's just one small aluminum tag I got a Petco. If I hang all his tags, rabies, license, etc. around his neck he won't be able to move.

Of course, it would act like an anchor and keep him put.