It is important that if at some point we do not have a clear understanding about a rule a casino has in place that we ask for clarification, as a great deal of the time many of the complains casinos receive are about a misunderstanding between what the players interpret a rule means and the way the casino actually applies the rule
In general, companies try to make their rules as clear as possible and avoid any terms that may cause confusion. But it's always recommended to contact the support and ask for clarification if you have any questions.
According to my experience, following common sense is more than enough to avoid getting banned. You don't even need to read all the ToS. For example, if the casino offer bonuses then you should not abuse it by creating multiple accounts.. If gambling is restricted in your country then you should not use a VPN to access the casino...