Well Doug - I have acted as a dual agent numerous times over the years, and, to respond to your question, yes, I have acted ethically.
I can't, however, tell you whether other agents act ethically, when acting as dual agents....or even as buyer's agents for that matter!
I'd like a dolar every time a buyer's agent told me their offer was only a starting point, and that their buyer "would go up in price".
One isn't assured their agent will be ethical just because they call themselves a buyer's agent.
That being said.please note, since we are discussing this, that in NJ, in order to show any COMPANY listing, the buyer has to agree to dual agency, All agents are considered dual agents when showing any company listing and are bound by the rules involved in dual agency. If you work for a large company, as I do, invariably you will be in that postion when working with a buyer.
So..it's legal, and almost necessary here, to work in that capacity when the opportunity presents itself.