@Patty:
I do know it's quite easy to retrain a dog to a name but it does take time.
I would be willing to bet money I could clicker train the average dog to respond in 15 minutes flat! But that said, the average dognapper probably doesn't do clicker training.
I don't like jingling tags in the house, and I am sure sensitive dogs are annoyed by them…...especially a Basenji that is getting into trouble and the jingle gives the game away!
I think it is very important to have ID on the dog. Microchips are fine, but only if there is a reader handy. I love my embroidered collars because they are "noise free", but I have used tags in the past and don't want my dog out and about without his identity easily accessible.