Violating a private entity's TOS is not a federal crime. He did not mask anything: MIT has an open network, and apparently unlocked wiring closets (trespassing

Violating a private entity's TOS is not a federal crime. He did not mask anything: MIT has an open network, and apparently unlocked wiring closets (trespassing was not charged). Rotating your IP address on an already open network to circumvent said TOS does not constitute a statutory violation either. You can sue him, that's about it.