yeah, that's a cheater, or otherwise know as an adaptor.... they almost irk me as much as when people just break the ground pin off. =( I remember once when I was a kid and we had a plumber snaking our mainline out, the plumber asked me to plug his cord in for him.. I told him it wouldn't go in without an adaptor.. he snapped the ground pin off and handed it back to me.
I caught him somewhat offguard when I told him he might get electrocuted doing that.. then he still asked me to plug it in... hey, I was only about 6... who was I to judge
