I agree that the moderators are often shorter than they perhaps absolutely need to be, have made what I consider to be mistakes. That said, you are a GUEST in those forums. You AGREED to the rules when you joined, no matter how draconian or unfair you feel they are:
http://forums.bistudio.com/misc.php?do=vsarules
I do not believe that being a paying customer *entitles* you to *anything* - other than: access to the product you purchased (probably the Alpha, Beta and Full versions of Arma3), and the protections as a customer spelled out in the Steam and BI Terms and Conditions you agreed to when you made your purchase.
I suggest you suck it up this time. Accept that the BIStudio forums work differently to the forums you're used to. Re-read the rules. Decide whether access to the forums is worth abiding by them. Then - if you still want to be involved in the forums - PM a moderator and: apologise for any misunderstandings, politely explain that you have re-considered and are willing to follow the rules, and ask if your account would be unbanned.