I'm afraid you're jumping to conclusions if you think that's ignorance. I've been there (interning) and done that. I have also been in situations since where I have 'hired' interns, and it prays on my conscience. So I know as well as most what the deal is in the use of interns, and how the balance of benefits is skewed way towards the employer.
Well, where I work, interns are actually getting real experience, are paid real money, and a good percentage of them has a job lined up when they leave university.