It is absolutely a violation of their conditions of use, unless this person got prior permission from IMDB: http://www.imdb.com/conditions
"Robots and Screen Scraping: You may not use data mining, robots, screen scraping, or similar data gathering and extraction tools on this site, except with our express written consent as noted below."
If you'd like to use their data, they do have an ftp interface:
There's also the OMBb API, https://www.omdbapi.com/, the TMDb API, https://www.themoviedb.org/documentation/api, the MovieLens dataset, https://grouplens.org/datasets/movielens/, and a few others. So if you're looking to use the data yourself, I would suggest you try those sources rather than a resource that might have legal issues.