If nothing else he got free food, correct? If each meal cost AOL around $10 then that's $10 * 3 * (2 * 30) = $1,800 worth of damages. This is not including any snacks / soft drinks / free gym / other perks that he might be snatching on top of that. If he caused that much damage by taking and then selling books from a local library we'd be in uproar.
Comparing this to RMS isn't fair either. Everyone knew RMS was staying at the university -- his postal address was literally the desk he worked at.
Just as this guy stole quietly doesn't mean he didn't steal. He has raised $70k in funding and then has gone on to steal at least $2,000 from AOL. This isn't just unethical, it's illegal.