What if every word and thought you uttered, regardless of whether there was anyone to hear it and regardless of whether or not you remember doing so, held power? What I am trying to say is that every time you say a curse or condemnation, that plea is recorded on some metaphysical list, some cosmic suggestion box, and some sort of powerful mechanism of the universe obeys the command.
For example, I went upstairs to get some of my parents' leftover chili. When I saw that the pot of chili was no longer on the bottom shelf above the vegetable drawer, it invoked in me the memory that my parents will sometimes needlessly throw away food that is nowhere near its expiration date. They will throw away food on a whim because they don't think anyone will eat it. And they throw away the food precisely when I intend to eat it. In my mind I said, "Damn you, mom and dad." Taken seriously, I just petitioned that my parents should experience sort of cursed existence either in this life or after this life, depending on ones beliefs. Moments later I saw that there was a small tupperware container with the remaining chili in it and I mentally decided to take back the plea for damnation. I was inspired to write on this idea because I felt that I had filed a cosmic complaint only to wish that I could revoke my cosmic complaint. I pictured myself going to some sort of transdimensional court, waiting in a line and filling out paperwork, just like you would if you got a ticket for not having proof of insurance and got it revoked by bringing your proof of insurance to a teller at the courthouse.
For a lot of people, I don't think this whole idea is all that farfetched. It is almost a given in much of the writings and traditions from ancient times until now surrounding the Jewish and Christian scriptures. A Psalm, for example, is little more than a publication of such thoughts and utterances. When people pray, if they believe that there is a god listening and that the god considers their prayers and acts accordingly, they are wishing or believing in a system of cosmic record and justice. Outside of the big religions, the power of words is incredibly important in the historical practice of magic. To utter a thing's true name is not just powerful in the case of Rumplestiltskin, but also in the case of many far eastern belief systems. While magic often requires the proper combination of words, it also surrounds proper intention. In the Harry Potter books, this is exemplified by the fact that Snape tries to teach Harry to cast spells without speaking. After all, speaking alerts an enemy to your offensive. If you can think or will, if you can intend a spell, then that is even more powerful.
As for me, I'm always the skeptic. While it's an interesting idea, I think it might belong more to the realm of fantasy fiction writing than any kind of nonfiction writing.