You weren't banned, but your comments were caught by a software filter. Sorry—new accounts are subjected to extra filters because of past abuses by trolls. We've marked your account legit so this won't happen again.
All: it's much better to email issues like this to hn@ycombinator.com, as the site guidelines ask: https://news.ycombinator.com/newsguidelines.html. It's pretty random what we do and don't see on the site, but we see all the emails.
https://news.ycombinator.com/newsguidelines.html