Since when has gambling been something parents need to worry about? The law is clear, surely? Well, yes, it is, and under-18s aren't supposed to gamble - but 15% of 11-16 year-olds say that they've gambled in the last week. Plus we know that the earlier you start, the greater the chances of becoming a problem gambler in later life. So should parents be as concerned about gambling as about, say, drugs?