I have just read about how Facebook actually started here, and, boy oh boy, I was really frustrated about it. I admire Mark Zuckerberg's tenacity and determination, which is very evident in how Facebook fares in the current era, but it was a blatant idea theft executed by him that he kept on denying up to this day. What's worse is that he intentionally left the original creators hanging, thus, making them lose the headstart from being the first to attempt to execute the idea.
I'm all good for sharing ideas. In fact, I prefer it because it brings out the best in the ideas by inducing competition between the persons interested. But we should avoid this sense of needing to bring down your competitor just so you can get ahead, because the truth of the matter is, you don't get ahead with that. In fact, by bringing down your competitor, you stay at the same point, giving you the illusion that you're winning, when you're still the same distance from that finish line. When one gets to have a healthy competition, everyone there gets to contribute to the advancement of our knowledge frontiers in a more surefire and efficient manner.