The chances of an mkv or mp4 containing malware are not zero, but might as well be, imo. You're much more likely to encounter moviefilename.mkv.exe or moviefilename.zip which contains an executable of some kind. Basically traps to take advantage of dumbasses. If you even sort of know what you're doing using tpb for purely media is okay. Hypothetically, of course.
Amazon and Tolkein Estate force author to destroy all copies of his work. Only pirated copies will survive. (variety.com)
Pirate Bay URL Disappears from Google Knowledge Panel in 'Blocked' Regions (torrentfreak.com)