Gambling companies have a responsibility to protect children and gambling addicts. They should not advertise on posters in poor towns and villages because people there have money problems. If they advertise in rich cities they should avoid schools and youth clubs. Gambling ads are a part of daily life for people who do not want to gamble.
If we look at this critically we can't really blame the casino for advertising because that's a way of expanding their business. It's the responsibility of the parents to guide their kids and protect them from informations that they don't need. As for those that are mature it's easy not to get influenced by these ads, if you don't want to gamble and if you are not an active gambler all you have to do is to avoid it