I want to know that do anyone ban or posting in the bitcoin forum?
If so what you did to establish again yourself?
Read this thread
https://bitcointalk.org/index.php?topic=1689727.0it will help you get a general idea about all the rules.
and also before post on any section read the pinned posts by admin or moderator of the section, there are some specific set of rules for each section so that will help too.
If/when you are banned you get a message saying the reason and what to do to get your self unbanned. you'll have to follow those instructions, or you'll have to make a brand new account and start from the beginning, so be careful and just follow the rules, you'll be fine.