You have a point but I don't think that gambling companies take students to be their main target, they are just running a business and they are not responsible for anyone's personal gambling activities. People who gets addicted to it are not being compelled of forced, it's a personal decision. The only way to make sure that students don't get tempted to gamble is if they avoid setting up centers close to school environments
Evening the gambling companies will be aiming at a targeted audience, students will be the least on that list because they know there people in their majority are not earning but are dependent on a guardian or their parents for money so mostly their source of income is such that will not allow then gamble at a certain level of which most casinos make a greater chunk of their profits from hig and big stakers not the smaller stakes from gamblers like students.
People who work, businesses men and other top earners are even the most target of these casinos but the irony turns out that the middle class and the broke are the ones who patronise the casino the most in a bid to double up the little they have got already and some of them actually loose it to the casino and enrich the casinos while some of them go dead broke.