karma comes back and hits me on my head from time to time

First off, I stopped believing in god and zodiacs and destiny and karma and what not at one point of time. This agnostic bordering on atheist skeptical thought pattern has taught me to be more responsible in my actions and exercise more self control over myself and have more self regulation rather than expect the hand of destiny to guide me in the right path.
Anyways, inspite of this lack of belief in destiny, I sometimes fall into points in time where suddenly i realize or understand what another person must have gone through while having faced a similar situation .You see, while going through a predicament, I suddenly recall some point in the past where i must have ridiculed or questioned the credibility of someone else who prolly went through the same state of mind back then.
Like for example, a few days ago, when i suddenly realized that i have no possible control of who gets to read my public blogs and unless i make them private there is no effective way i can stop people from reading these blogs and wrongly interpreting them in ways I didn't intend to mean them even. And suddenly I was filled with this urge to just make my blog private or even better just delete this blog altogether and at this point I could suddenly understand why this person kinda deleted all of their blogs from the past two or three years , suddenly out of the blue. I was all kinda pissed with this person for catching me unawares and such.The blog that i took for granted was suddenly not there.At that point I just could not fathom that state of mind that could lead a person to do that. But now I do and this i call, karma coming back and hitting me on my head .