I can guarantee if you, or anybody else, made that post - or any other post that isn't spambotting - you would not have been banned. No question. I can tell you this as a cast iron FACT! because nobody is ever banned for a single post. Simply isn't how BL works.
As for disciplinary actions in general, they are all taken on a case-by-case basis and by no means is the "right" decision always made because staff are human beings and all disciplinary and/or censorial actions taken by human beings are necessarily subjective. We don't moderate by algorithm and it is perfectly legitimate to note that sometimes the self-same post could be unapproved, warned, infracted or completely ignored depending on the time of day, any staff who come across it, any reports made of it, any staff that read the report, and any discussions had about said mod discussions and/or actions of it. Furthermore, said deliberations can and frequently do go through several layers of staff discussions from local to sitewide staff all the way up to smod and admin level. Checks and balances, innit.
In short, almost nothing is ever as straightforward as it seems and just cos it isn't always obvious that actions have been taken doesn't mean that is the case. We never discuss specific posts, members or situations for privacy reasons (aside from the Evey situation where things got so out of hand we felt we had no choice - but that was a truly exceptional situation). If you have a problem with a post feel free to report it and something may or may not be done which may or may not be to your satisfaction. If any member just grates on you then put them on ignore. Other than that it's all just popcorn - and popcorn that is rapidly getting very, very stale.