Newsflash everyone, if you open source your code it's going to be copied or paraphrased anyway.
But if I do it under a copyleft license like GPL, I expect those who copy to abide by the license and open source their own code too.
But sure, people shit on IP rights all the time, and I am guilty of it too. Let's say I didn't pay what I should have paid for every piece of software I have used.