Media kills in so many ways, it's honestly surprising how varied this genre is. It never fails to delight me to see what filmmakers will do with such a seemingly simple premise.
Black Roses: This movie fits our theme in a few ways, but I gotta say, this scene is probably the most literal interpretation of "media that kills" that I could ever find! (Excuse the Spanish, it's the only version I could find.)
The Ring: Like a haunted chain letter from hell, media can kill you for merely consuming it as intended. [Side story: before the US remake of The Ring was released, an unmarked version of this short film was mailed to my job. We watched it, and were thoroughly confused. A day or two later, free passes to a sneak preview of The Ring also showed up at my job. A few of us went to the screening and I was EXTREMELY UNNERVED when the tape we watched just days before was a key part of the film. When I got home, I unplugged everything in my house (except the fridge) and didn't plug anything back in for a good 9 days, just to be on the safe side.]
Videodrome: Definitely the most "out there" in this category, the voice-over explains it best, "TV will change your mind, Videodrome will change your body."
The Running Man: Sometimes when media kills, it's by design. (This was one of my favorite movies as a kid, and I'm really not sure what that says about me...)
Terrorvision: Media can bring a monster directly to your living room.
Brainscan: But media can also make you the monster...
Pontypool: And with no further explanation, Pontypool is on this list. (Just watch it.)
Clue #1: This month's movie is an underrated genre-mashing indy horror. (It should also be noted that there's a fair amount of brutal violence in this film but, the film offers much more than brutality alone.)