To gamble, individual gambler need to pay attention to restricted areas to avoid been locked up with notice. There are some areas which are majorly restricted to different gambling platforms. To pay close attention, one need to read or go through the site terms and restricted areas that are not allowed to prevent lost of funds.
There are sites that auto blocks you if you are on the restricted country, casinos can have this tool too so that no funds are going to get locked if ever they are really concerned of the gamblers because you know terms and conditions page are so lengthily this is why it's often skipped.
If ever we are on blocked countries, so be it. Do not ever attempt to use any kind of bypasses or vpn's as this is mostly against the rules. If the question is only finding a reputable casino, that's easy. We are already on the right place to ask but not all reputable casinos are the same, we should figure out next if what service and features suites us the most.