It is subjective. I believe the application or suggestion here is if you are in a community that denies people under 18 the right to have access to certain books over philosophical differences, you can create a book server and give them access to books. If you live in a state, or institution in your example, that will legally punish you or worse for selling or owning a book, you can create a book server. The two are not different really, the systems/people that are limiting the access to literature and information through varying means of enforcement are trying to achieve the same ends, state enforced censorship and control.
In the article example, to deny this because of a technically or the degree of legal enforcement is foolish since it is rebelling against the act of banning books, the process of banning, which doesn't occur out of thin air, it is an evolution of acts. It is not an absolute and one doesn't have to wait until there is a legally defined ban to start the protest. That would be ridiculous as it would be too late.
I don't think the project is trying to make the Banned Library of Congress either, anyone could put whatever books they want on their server. It is suggesting civil disobedience by circumventing oppression through censorship with creativity, which is awesome.
It is not disingenuous, maybe a little loose on the 'meaning', but your definition is rather narrow. The Color Purple has been challenged many times in order to be removed from public library circulation and public school curriculums. Annie on my Mind was banned from the Kansas Public School system and subject to book burnings at the federal courthouse. The removal of the book (ban?) was overturned by the court. There are many similar examples of this on banned book lists. Colloquially, the term 'banned' is used often to encompass books that are actually banned, challenged, or illegally removed from public spaces due to a group actively censoring literature for various reasons. I think that general use is fine rather than being pedantic about it considering the social and intellectual costs involved. To call a book that is removed from circulation illegally not banned because there is no law banning it is foolish, since that is a reoccurring tactic among groups applying censorship on communities.
I used a saline glitch trick in the 90s. I cannot remember the exact sequence of events, but one injected saline into the coin or bill receptacle, which made the sensor believe money was being continuously inserted into the machine. This method had the benefit of clearing the machine of change after purchase since it registered the candy bar was bought with a substantial amount of money.