I have two android apps which depend on scraped data. I took permission in one case (good people at basecamp did not mind!) and did not require any permission for another because I was showing data only to the intended user (just in a handy way). My learning...Never be totally dependent on someone else's website/product. The second website went down around 15-20 days back because of some country wide server upgradation activity and my app installs/rating are going down since then. All those people who were giving 5 stars and praising the app are now abusing it with one star!