what the fk cares about copyright, this is coming from community of game hackers. They don't care.
It does if they want to use his code for anything. The parent commenter is also clearly making the point that his efforts are to be used by people who share the same sentiment of "fuck copyright". Which I think is a noble perspective, since IP laws in the US are much more bad than good.
Free software movement abuses the copyright system to prevent anyone from “owning” the software and putting a fence around others' work when greed tells it's suitable to do so. It has no intention to support its existence. As people only have that mediocre system today, and believe in it, it is used as a tool to partially formalize something from a different sphere of values.