I'd disagree about ideas being stolen in the sense of theft. When someone 'steals' an idea, they're not erasing the inventors memory. He retains the idea.
Patents and copyrights both exist for the same reason. To generate a financial incentive for inventors to invent by granting them limited monopolistic rights. They were also designed to be moderated by the general public's rights, hence the idea of fair use, public domain, and first sale doctrine. (Doctrine of first sale is why Ubisoft doesn't deserve compensation for you buying a used game off Ebay)
As for my background, I generate copyrighted works for a living as I'm a software engineer. I also have a pretty good understanding of copyright law, it's formation, and it's evolution over the years... it's something of a hobby. The large publishing companies have been doing quite the PR campaign over the years to convince the public that they have fewer rights than they do. The sad part is that, as evidenced by these threads, it appears to be working
Patents and copyrights both exist for the same reason. To generate a financial incentive for inventors to invent by granting them limited monopolistic rights. They were also designed to be moderated by the general public's rights, hence the idea of fair use, public domain, and first sale doctrine. (Doctrine of first sale is why Ubisoft doesn't deserve compensation for you buying a used game off Ebay)
As for my background, I generate copyrighted works for a living as I'm a software engineer. I also have a pretty good understanding of copyright law, it's formation, and it's evolution over the years... it's something of a hobby. The large publishing companies have been doing quite the PR campaign over the years to convince the public that they have fewer rights than they do. The sad part is that, as evidenced by these threads, it appears to be working