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.