I think we're in agreement. The "that's why we can't have nice things" argument happens at the end when traffic cams' public access is taken away because some clever soul found a novel use for the publicly available information (i.e. taking selfies), and the authorities were put out by it. So, public information gets locked down on spurious grounds, and the same clever soul is wrongly blamed for it. That's not fair, but someone will say ".. and that's why we can't have nice things", and others will say "yeah. that guy ruined it for everyone".
It's a bad argument as it ends up putting the blame on the wrong party.
But in these cases, it is the "clever soul" who's to blame, especially if they cannot be legally restricted from being "clever".
Like I said in another part of this thread: we should not be confounding "freely available" with "free to use without limitation". The various forms of open source licensing are testament to this concept: some things are indeed freely offered; others stipulate that you can't use them to make money without also offering your source code freely, etc. In both cases, the code is offered freely, but in the latter case, you're not legally allowed to use it without limitation.
Public information is often taken down because it can't be limited in such ways, and it relies on an honor system of sorts. Once people stop being honorable, there is no other choice but to take the resource away. The fault there absolutely rests with the individuals that have violated the implicit honor system.
This "clever soul" is trying to monetize this work, and encouraging others to do the same, which is pretty sketch.
It's pretty clear that the providers of a key piece of their endeavor aren't happy with them using the public infrastructure in this way. Is it not dishonorable to go against someone's wishes when they're providing something charitable?
When the public infrastructure is cameras that are constantly broadcasting the people nearby, and the use is saving a frame when you're one of the people nearby, no I do not see that as dishonorable. The intent of the provider only goes so far when it comes to super straightforward uses. And it's not a burden on the system. And if anything, now they're getting permission to take photos of that person in that moment (which is nice even if they don't personally make recordings of the broadcast).
But, for a lot of things, we have to exist in the gap between ethics and law. If someone, with access to ostensibly public NYCDOT information, uses it for "dishonorable" (not illegal) purposes, the DOT has three choices: legislate its use, remove it completely, or ignore the issue. Whatever they do, with the exception of the ignore option, will result in the vilification of our clever soul. That person did not make any of the decisions that caused the removal of the previously accessible public information. They just had a thing, they used it, and something happened. Could that have been foreseen? Maybe, but marginal. Guaranteed? Probably not at all. I just don't think that blame is fair. Let the NYCDOT do what it'll do and the rest of us can replot our courses if necessary.
OSS libraries, released to the web or wherever, have the same set of choices; and the authors can do as they please. It's their stuff, and their right entirely. But, blaming someone who acted "dishonorably" and resulted in a novel set of legal restrictions on an OSS library doesn't seem right either.
If someone took an open source library that had a restrictive license, and used it in violation of that license, if it can be proven that they did so with the intention of ignoring the license, they can be held accountable. In this case, even if they were ignorant of the license, they can still be held accountable. We can definitely assign blame to these people, and more so in the case of the one doing it with malicious intent.
So why is the same not true of these cameras? Especially if now this person has been informed that their usage is against the wishes of the provider; even if it's questionable whether or not the initial usage is "dishonorable", once the provider's intentions have been made clear, if the "clever soul" persists, it's not out of malice, which is definitely dishonorable.
Intentionally violating someone's expressed preferences is often legal, but I think it's almost uniformly seen as a negative (i.e. dishonorable) thing. Except in the most extreme cases, where someone's preferences are generally considered unreasonable, we have good reason to treat those who ignore preferences as untrustworthy or unjust.
So there exists a fourth option: NYCDOT makes a plain request that this kind of usage stop, and then rely on people to honor those wishes. This is like basic social reciprocity, so I'm constantly amazed by how many people argue that we shouldn't engage in it. At the end of the day, that's what you're saying we should do: be fine with people who are asked to stop, and who respond with "no, you can't make me". It's not unreasonable that NYCDOT ask that their cameras not be used to gain people likes or viewers or money; but it does strike me as unreasonable to applaud people who intentionally ignore (and even flout!) the lack of enforceability of that ask.