Does Karma exist?

Note: In this context, I am purely talking about "payback" and not the destiny cycle as defined by Hinduism.

  

Do you believe in Karma? Like if someone did something wrong, do you believe that eventually, surely it  will bite them in the ass? And even if you believed it, does it make you feel any better about the injustice that was meted out to you? No offense to anyone, but I only believe in Karma to the extent of limiting my own "bad" actions so as to not suffer from something else in the future and then wonder if that "bad deed" was what caused the sufferance in the first place. If only everyone followed this give-and-take policy, people would be erring on the side of caution. As for how it affects other people, I find no solace in consoling myself that they will pay for it, especially while I am nowhere around to witness it. You know what I mean? If someone stole your ideas and profited from it (not too scientific, mind you or on the lines of plagiarism), what good is it going to do you if you believed that he/she will somehow pay for it in the future? And that too after they benefited from your ideas. And it seems much more satisfying to take things in your own hands. And this isn't one of those take-the-law-into-your-hands kind of situations either. This is something personal... something you want to do... something for which laws don't exist.. something that just surpasses the moral boundaries that you've set.. something that is so irritatingly important for you to settle for yourself... something that you owe to yourself... something. Bah, Karma isn't waiting around to redeem you. It's off busy with the bigger bad-doers. So you might as well take this in your hands right? Glad you agree. Only the piece of your mind can bring peace to your mind. Ah wordplay! Time to grab the fictitious bull by the horns.

PS: Any violent actions against anyone/anything are strongly discouraged (unless it's a stress-buster/punching bag, in which case, go for it!!)