As an aside, fuck websites that prohibit scraping. If you send me some bytes I'm gonna do whatever I damn well please with them.
Isn't it the same approach? If you can abuse a site you will, because they opened themselves up to the public?
So a website allows you to "download some bytes". Yes you can do anything you want with THOSE bytes. Does this mean you should make an app to let people scrape the website in an automated way and possibly overload it?
If airlines, restaurants give something free or discounted, does that mean you can make an app to systematically let millions of people take advantage of the arbitrage?
XKCD even has a comic for exactly this situation: https://xkcd.com/1499/
I wasn't the one who said "FUCK WEBSITES". I used a nicer word and questioned the logic. Yet I get downvoted while the parent comment with expletives is upvoted.
EDIT: Oops, missed that he didn't end up going live with the scraping.
It would still be great for the MTA to publish this data intentionally; but I'm sure the potential for trains to switch tracks and the associated backlash when they do is what prevents them from doing it.
Perhaps they could adopt the airline model, where there's a best effort to reach a particular pre-announced track, with notifications ringing out when they can't.