Of course the childish comments that seem to have been posted on github were probably not great, I think people should be respectful, so maybe the additional lesson here is that github, by trying hard to become a social network and not focusing on being a code host and issue tracker, succeeded in being a social network, with the whole package, attracting this kind of shitty behavior, and that's one more reason to avoid it now. You wouldn't upload your code on a social network, would you?
If you don't want cooperation or forks, a zip anywhere will do.
That's good, IMO. Don't steal IP and you don't have to worry about getting caught for stealing IP. FYI: simply hiding the code doesn't fix the issue - disgruntled employees and whistleblowers do exist.
That said, I'm just as a casual observer lying in bed with the flu, I probably should just shut up until I know more the situation.