Sorry, you're way off base, in particular with the especially snarky last paragraph. If the effort up to the point of the patch was used, then the effort has value and an acknowledgement is necessary. Taking the work without attribution is tantamount to plaigiarism.
Could you tell us which open source projects are yours so that we, as a community, can avoid contributing to them? We don't want to support this type of behaviour.
Thanks. It happens and we're all subject to these forces - that's why they're hard to manage. It's too much to expect that they won't sneak in unintentionally.
The main thing is to re-read one's comments after posting them and then edit out anything you notice that breaks the site guidelines. It's much easier to notice these things after posting them. That's my experience anyhow, and it's why https://news.ycombinator.com/newsguidelines.html includes the phrase "edit out".
One tip, in case helpful: you can set 'delay' in your profile to give you time (up to 10 minutes) to look over and edit your posts before others see them.
Could you tell us which open source projects are yours so that we, as a community, can avoid contributing to them? We don't want to support this type of behaviour.