Hmm haven't seen the movie yet but let's see.. It's weird that it was a gypsy who did the curse on the soul, has the same storyline in vise versa of Angel story from Angel: the vampire series derived by Buffy the vampire slayer storyline as well, where Angel/ Angelus was a evil vampire that had a fierce bloodlust in the past and tried to kill a gypsy and the woman give him a soul that haunted the vampire and perceive life as a human being, so he was cursed with the soul that he lost when turned into a demon spawn. It seems in this film is the other way around..
We all create the reality in which we exist, what is real for one person, is imaginary for another. Life is only seen through the eyes of the beholder, nobody else can see what we see through our own eyes.
Many old cultures believe in the superstitions of being cursed. My grandparents coming from Italy believed very much in this aspect. so yet the assumtion of the effect would be like many beliefs. if you believe highly in them than you in some way would create the curse more .
Believe in it and it will happen,
Hollywood has alot to say for it, yet Being cursed at some time given enough of the hoopla the person would eventually fall into the relms of beleiving.
cadrewolf made a wonderful point.
I have read stories where someone want to a false fortune teller and she told the client she was cursed, for a sum of money she could reverse it.
I would not be afraid to put money on it she got this idea from a movie or television show.
A book titled" Liscened to steal" may be a good read to understand some of the practices of Gypsy.