While laws vary by country (strict in Germany and the US, lax in Spain or India), streaming is technically a copyright violation. You are not hosting the file, but you are downloading a temporary copy. Recent legal crackdowns in the UK and France have led to ISPs issuing "education letters" to users who repeatedly search for specific titles like The Punisher on illegal indexes.
: You may encounter low-resolution "cam" versions or frequent buffering that ruins the gritty atmosphere of the show.