Ask HN: How to reach seniors (cheaply) to warn them about student debt?

(Some) High school students get screwed - many are too young to make good financial decisions, and take on debt that will stay with them for 10+ years. I want to reach seniors and make the case that there might be better alternatives - like gap years, working internationally, studying internationally in a country that has low tuition, etc. I'm willing to spend some money, though if it requires $ I'll assume I can't reach 50% and will just go with whatever $100 gets me. I believe that talking with a graduate similar to them with lots of debt would be convincing. I have no debt, but I know people with debt and am outraged for them. How might you achieve this? All ideas and thoughts welcome and appreciated; I won't be upset if it doesn't work