Weird question and really opens up an entire line of discussion that neither you or Superdave are interested in. I'll try to answer it but I don't think you'll really be satisfied.
What you have to understand is that it's not like Harry Potter or every Hollywood presentation of "magic." The world and our interactions with it, and each other, are bound by basic natural and ethical laws (because, trust me, if it weren't there would be WAY more rich witches out there). From a purely spiritual perspective, my rights end when they infringe on the life/free will of another without their permission, and that includes doing positive, helpful things. So
would I consciously do something that would significantly and directly impact another, no (IOW, I would never truly wish ill on my ex husband, for example). And honestly, if you're in a fight for your life, the guy with the rock versus the guy with the magic is going to win every time.
However, have I "wished for" things to happen that, by all rights, shouldn't have and in so doing affected others. Yeah, I think so. You have to remember, when "magic" works it's not instantaneous or like a stage show, it's generally subtle (which is why I was using the metaphors of medical miracles and lucky guesses). It's better to think of it more as placing a request in the hands of the universe and having confidence that request will be filled in the course of natural events.
Without going into even more exhaustive details than I already have, I have had things happen in my life that I wanted very much
TO happen that I definitely gave a little energetic nudge to. Sometimes it turned out I've gotten what I wanted because I followed a strong hunch, sometimes it was just a matter of a unusual opportunity presenting itself at a very opportune time. Some people would call either situation luck or coincidence. My personal opinion, the question begs to be asked, how much magic is simply one's perception? Assume that maybe you don't believe in magic, but you do believe in psychic phenomenon and ESP. The question then arises did I forsee what decisions to make so that I achieved a desired outcome, or did I simply know what the outcome was going to be, no matter how outrageous, and in so knowing unconsciously decided that was what I wanted?
Think how ancient people perceived lightning. Imagine that, like them, you can't quantify, measure or predictably reproduce this phenomenon. What would you call it? What would you think causes it? When ancient people saw the destructive power of a lightning strike, they simply saw the work of the gods and couldn't imagine it could possibly be anything else, much less a useful tool (and imagine if it was your neighbors house that was struck, and it just so happened that you just quarreled with this person, then imagine how your perceptions are skewed). When you think about it, magic is simply the name humans have applied to any technology or phenomenon we haven't come to understand yet