AFAIK anything that binds you a ToS (e.g. registration) is offlimit for legal scraping in USA as USA can literally put you in prison for violating _terms of service_, which is pretty crazy. Other countries are much better about this, though you should always consult a lawyer if something you want to scrape is behind a login page.
Does "publicly accessible" also apply to websites that are totally free, but require registration (which is open to anyone)?
And even though this is in the US, do cases like these set precedents for other western nations?
asking for a friend ...