No, most people will never be banned.
A significant number (though still a very tiny proportion) get banned within a few weeks of joining because they never really even try to follow the rules.
And a rather larger number (still a small minority) get warnings or infractions every now and then.
It really isn't hard to post in a way which will avoid getting infractions, and the majority of members here do so all or almost all of the time.
You always know just how close you are to a ban. I think the number of infractions required for temporary and permanent bans are reasonably well known - and I certainly tell people - the next one means a temporary/permanent ban.

