I have no defense for HN; the website is designed poorly, moderated inconsistently, and the YC-affiliated retinue is sketchier than a pencil drawing.

That being said, people who take things personally for no reason is exactly the reason the "flag" button exists. We all know that the Half Life source code is out there on the internet, most of us agree that copyright is stupid, and a good handful of us are probably deliberately violating copyright law. That isn't your excuse to deride people who make things that don't conform to your (literally illegal!) outlook on society.

This is a really cool project that is in no way invalidated by the existence of leaked source code. Your copyright tangent is a non-sequitur and deserves to be flagged.