I think a lot of dogs don't like dogs they don't know in their face when on lead. I think giving it a doing for not being comfortable with it won't do the dog any good, just supress its fear.
As for scruffing not had the nead to do it. I watch my pack and the lead dog never has to tell the others off, one look and they do exactly what he 'says' all the other dogs think he is god no messing about. He doesn't have to 'scruff' or even growl one look and the others stand to attention. I agree a dog learns its place, consistancy, patience no need for brute force and ignorance. If it works for othe