Should dog collars that administer electric shocks be banned? That was the BBC article that drew my interest this afternoon.
My initial reaction was that they can be a useful training device. When used in training, they make it possible to draw the subject up sharp. They are no use for rewarding good behaviour - on the continuum from "stick" to "carrot" they are definitely at the "stick" end - but still, they can keep them away from danger, stop them wandering from the path - generally it gives the keepers a bit more control over unruly, out-of-control subjects.
However, on closer investigation it turns out that the collars in question are for controlling dogs, not vicars, as I had assumed. So there's absolutely no question about it. Ban them. Now. It's vile.