It's graded immediately (automatically), so there wouldn't be any issues. Further, the text of the problem makes it clear that I'm not actually going to check t

It's graded immediately (automatically), so there wouldn't be any issues. Further, the text of the problem makes it clear that I'm not actually going to check their age - they can return any valid number (although it does check >0 and <100, perhaps discriminatorily). It would be a little invasive to their privacy otherwise, I think.