Under a Libertarian regime, the whole thing would've been simpler, as no theory of justice or societal good would've been involved. It would've simply been JSTOR and MIT extracting whatever revenge they'd considered.
Let me illustrate. Say you belong to a private club. The contract of membership allows you to use the clubhouse, as long as you don't bring any Hindu guests. Say one day you do. That's a breach of contract. Say you come back the next day. Since you've breached the contract, your license to use the house is revoked, and now its an infringement of property: trespass. Finally, lets say you punch the owner for being racist. Any classic libertarian will support prosecuting you under three legal theories: breach of contract, trespass, and battery (a tort). Classic libertarians don't reject any of these.