Peter, Not only is your comment arrogant and preachy, but it is also spammy. They all took mature responsibility for their behavior. Advice For … Illustration by Barry Falls. I keep reminding him that he still has five months of school left, and soon he will be off to college, making his own set of rules for himself. I am the mother of an year-old boy and a year-old girl. Safety net if they crash and burn? While your 18 year old lives in your house and eats food you put on the table, he should respect your rules.