Well sure, that's a good point -- maybe they should make a few appearances on the university campuses, ultimately, where their biggest future customers (statistically speaking) hang out, signing students up for Aeroplan, giving away points for doing things like participating in games, one-time passes to upgrade the student Z fares to J, student-only MLL pass giveaways, scratch-and-win tickets (ie: win $50 off yer next flight, win a MLL pass, win a J upgrade, etc. ), etc.
enRoute magazine makes a good point of pointing out that most of its 'readership' is university-educated, often with advanced degrees -- which means that AC customers are disproportionately higher-income, university-educated. If AC wants to build a market for its services and build loyalty, may as well get 'em while they're young.