The Internet is a funny thing. It allows people to say whatever they want with relatively few consequences. After all, when you're not face-to-face with the person you're attacking, what do you have to lose? This anonymity allows cowardly little men to feel big for a change. So bruised and battered by their meaningless lives, they lash out at those they're unspeakably jealous of.
These people love to take pot shots at others from the comfort of their computer screens. But, if you invite them to repeat these insults to your face, they'll shy away from the opportunity, electing to hurl more insults when the object of their smears is safely miles away.
You can typically ignore these people. They're not worth anyone's time. They're not in control of their lives, so they rely on ideas like "karma" and other superstitions to take care of what they are too afraid to face themselves. As for me, I believe people are responsible for their lives, and life is what you make of it. I don't need superstition to give me comfort; I prefer to take charge of the situation.
I remained quiet in the face of false accusations coming from a bitter ex-friend. After inviting him to repeat these lies to my face, he not only declined the offer, but resorted to what he does best: he simply spewed more lies and more venom at me. I asked him point blank to back some of the accusations up, and he, once again, could not do it.
At some point, you have to laugh! It's hard to believe such people exist in the world, but they are out there. The trick is not to bring them into your life, which is a lesson I learned the hard way.
I don't think I've heard the last of this guy yet, but if he decides to run his mouth again, I might not be so quiet. We'll see.