Another common weird academic license issue I've run into is people making up licenses to try to enforce academic norms about citations. Usually in these cases

Another common weird academic license issue I've run into is people making up licenses to try to enforce academic norms about citations. Usually in these cases there will be a term in the license that requires a citation in any paper that gets written about data processed by the code. Since it make it legally questionable to use the code (what if I forget to cite them? Will they sue me?), fewer people will want to use it, making the whole exercise of publicly releasing the code less useful overall.