Awful. Might have something to do with the fact that my mum's side of the family hails from some ridiculous hamlet in the Swiss Alps (yes, really!) where every purple-permed vicious old hag around is called Heidi (except for the equally horrible Trudies). Might also be due to Heidi Klum, a.k.a. squeakiest voice alive. Either way, it's not something one should legally be allowed to do to a child IMO.