Lately a lot of the local rescue community has taken to using standard rope slip leads as head halters. The lead is just looped figure-8 style around the dog's neck and nose and then the slide keeps it from loosening too much. Is this common anywhere else? Or just here? I'm not a huge fan of casual head halter use in general because I see a lot of dogs getting their necks cranked by inattentive owners, but the slip lead head halter thing doesn't sit quite right with me.