[lin83]

I don't think that's true and, if it was, it would be the death knell for open source.

Code Plagiarism is taken very seriously by every company I have worked with. Multiple companies have been sued for violating the GPL. The SFC is currently fighting Vizio in court for example. While not commonplace, to say it's "almost impossible" is a stretch. Every large company complies with code copyright obligations for a reason. My company publishes changes to GCC and a dozen other GPL projects. Entire products like Protocode and BlackDuck exist to ensure code compliance. Even small code snippets are flagged.

Over the past few years the source code for Windows, SQL server, Bing and Cortana have all been leaked. If someone built a product using that code, how long do you think it would take Microsoft to sue? CoPilot is one rule for mega-corps and another for everyone else.