Legally dubious? Not sure of the "website is old so pop along to a .ru site" exemption to copyright law. Did the author attempt to contact the copyright owners or discover an alternative?
I think most would agree that copyright laws fall into the category of "of, by, and for the 1%" as they currently exist. (They would look much different if the only goal was to protect inventors and protect society.)
[1] https://scholar.princeton.edu/sites/default/files/mgilens/fi...
questionable or suspect as to true nature or quality the practice is of dubious legality