>I gave my opinion
I'd encourage you, if you are interested, to subscribe to the list for a bit, if nothing else to lurk. I too am not impressed with "clicker training". I tell my human kid "no", and I am by golly gonna have situations where precious little Phydeaux will hear the "n" word from on high now and then.
The folks who post on AGBEH have had a lot of success, and they have a lot to offer. I don't agree with everything everyone on there posts, but I've seen successes with their methods. I would not suggest to this GSD's owner to join if I didn't think they had a high probability of helping her.
I am interested in dog topics and discussion, obviously.. :~D
But I don't agree that training devices like those listed are never appropriate, or that positive reinforcement alone will save an aggressive dog. You don't always have ~time~ to wait for them to do the right thing. I don't think it wise to 'ban' tools from the outset without any allowance for proper use of any of them. They have a place.
And... I find Yahoo groups message interface to be particularly cumbersome. I'll save the link and give it a look sometime.