You’re not really comprehending what I am saying. If I create an account, never post or comment, and just browse HN from the IP in question, that account will be banned. It has nothing to do with behavior.
If you're concerned about a specific IP, and haven't been abusing HN, it should be easy to clear up by emailing hn@ycombinator.com. And even if you have been abusing HN, we're always happy to unban people (and/or their IPs) if they give us reason to believe that they've taken https://news.ycombinator.com/newsguidelines.html to heart and will follow the rules in the future.
Edit to add: Without more details from you, I can imagine the mods being hamstrung with respect to figuring out or explaining what's going with what you're observing. Likewise, there's nothing preventing you from continuing your comments here while also emailing them. Particularly as it seems you'd like to continue to participate on HN. I can imagine you'd prefer to do so without the hassle you're currently experiencing.