when you do tend to play that place and with online theres already a law that prohibiting on playing online games which means theres no other place to go but to use vpn and using bitcoin and its really a great help.
I think most of the bitcoin accepting casino doesn't have any restriction on country so I don't think we have to worry about our IP. Using VPN may cause other problems like multiple account etc few of those casino don't allow you to have. Simply using bitcoin for deposits and withdrawals could be enough to remain anonymous. When houses are conscious about preventing usage of proxies, they might be losing more number of gamblers because many gamblers want to remain anonymous while gambling. Gambling sites respect their privacy and protecting themselves with the other types of measurements like time gap between climbing faucet etc.
Well they don't really care if you are using multiple accounts as long as you are playing by the rules and you are not cheating their referral or affiliate systems. Then again, you won't really have any benefit from having multiple accounts other than if you want to cheat the site. I usually just stick to one and most of the time the gambling sites don't block my ip.
But I think this free alcohol is just a strategy. The more you are intoxicated with alcohol, the more you are distracted and cannot focus. The end result, you'll lost more. 
and I think play gambling online was also the safest things I know compare to land based casino that might not be safe because your going to ride in the vehicle which is prone to accident. But still it depend on the gambling player of course.
