Thanks for your opinion, but it isn't an opinion held by myself, or my vet. Or my dogs professional trainers. My opinion, and theirs, is that a small electrical shock used as a training device is a very effective way to yard train my dog and does not real harm.
We live in a house where we cannot fence our front yard, and our front yard is what our family uses (our back yard is small and the layout of the house means it seldom gets used). Our dog wants to be with us, in the front yard. It would be far meaner in MY opinion, which is what counts when talking about MY dog to out him in back where he can't be with his "pack". The other opinions I take into consideration are those of professionals I have entrusted with the care of my dog.