As for the statement that a power on stall is unrealistic.... Oh really. I'm sure Bookworm could dig up a few reports of people who've killed themselves that way.
Actually my contribution was going to be to relate the following: the only time I recall triggering a stall warning horn in a situation when I really didn't intend to was in an unexpected go around in the Mooney with full-power on and full flap deployed.
I also remember doing some training in a 152 (I think it was a club checkride) with the then Chief Pilot of Marshalls. He suggested that we try a full power stall. As I was setting up for it, I asked "So what am I expecting to happen then?". He turned to me and said, in his inimitable deadpan tone, "I have no idea, I've never tried one before."
I also agree with BEagle that there seems to be no reason to take such an exercise further than the incipient stage.