I think Don and everyone else brings up some excellent points. Jonathon also hits on what I would call an excellent way to resist...if someone is trying to throw me by pushing directly into my power without draining it, it becomes counter productive for me to just fall. That would be tanking. But if a newer person is anywhere near the "correct" angle, of course it becomes necessary to give them some feeling of accomplishment. Very fine lines to stay within.
One of the hardest things for me in aikido is to establish appropriate levels of contact with each and every partner, from the moment we meet. And that can vary not only by partner, but also by association, dojo, event, waza, etc.