You must not have read the part about Aaron not actually being an MIT student at all - hence the trespass charges.

The trespassing charges were dropped. He was indicted for wire fraud, computer fraud, unlawfully obtaining information from a protected computer and recklessly damaging a protected computer.

None of which makes my point untrue. That he was not a student there. He may not have been charged with trespass, but MIT was not his alma mater, and thus owed him nothing in that regard.