I suppose you could call it a "curse", but specifically, whenever I encounter someone that I know I am going to be around frequently and there's dissonance between us, first I look inward. As above, so below, as within, so without. The dissonance is not just being caused by this person in me, it is being caused by something I have an attachment to and I must decide if that attachment really matters to me. If it is something aligned with one of my core beliefs and it represents a boundary I cannot cross, then I might "curse" this person.
But what I will actually do to "curse" them, is to perform a ritual aimed at conjuring trickster spirits which will "initiate" them somehow. I do not really specify how they are going to do this, only that they try to get that person to evolve somehow, to get them to "initiate" a new hobby, a new career, a new educational goal, a new relationship, something. Something will happen in their life that will break the inertia of their current state of being and then perhaps they'll have a change of heart, leading to the organic resolution of the original problem without a need for direct confrontation.