It is not impossible to ban gambling. If the government wanted to ban gambling, they can ban it promptly. Even history can show you that gambling can be ban. Ancient Rome ban gambling, China ban gambling, and many other government especially those with Muslim religions ban gambling. Gambling can easily be ban but it cannot be stopped. People will find way to engage in gambling activity eve if it is illegal.
That's true. A total ban on gambling is not a viable option. It can be banned but the government cannot stop people who are really interested in gambling. They will find a way to gamble even if it is illegal. And they can't stop online gambling since the internet is so open to everyone. The only think I think is logical is the legalization of gambling in a controlled and regulated environment.
Finally, gambling is a wasting habit which is not good for our economic stability or social life. If there is no proper regulation and gambling bets are placed illegally, it will be abused and the negative impact on society can be severe.