In the DWM comic 'The Flood', a group of Cybermen from the future use what can best be called 'emotional rain'. This rain causes humans to experience extreme emotional attacks. This leaves the victims so traumatised by the intensity of their experiences, that when the rain cuts off, and the Cyber Leader offers the humans freedom from their emotions, they all go willingly for conversion!
Astrolabus' final fate in "Once Upon A Time Lord", as Voyager reclaims his star-charts. We only get to see Astrolabus' arm afterwards, but that's enough.
Faction Paradox are a group of time-travelling psychos who are fucking about with time because they can, led by someone who is the accumulation of everyone'sevil future version. Their starships are built from skeletons and they wear skull masks taken from beings that don't actually exist.
As a Viral Marketing campaign, there was a BBC site called "Ghostwatch" (not to be confused with the horror Mockumentary), which was meant to tie into "Army Of Ghosts", where your goal is to get the "ghosts" on camera. After that's said and done, you're put in a different type of game where you direct the cameralady to a "Ghost" before time runs out. There are many ways this can go, such as finding a cat first, but it will end the same way every time, whether you wait for the time to run out, find the "ghost", or look at a conspicuous truck, the cameralady will shriek in fear as A Cybus Cyberman deems her incompatible and murders her.
Even the official Doctor Who documentary Thirty Years in the TARDIS ends scarily! The little boy who's guided us through the documentary is at the mercy of a Sontaran-controlled Elisabeth Sladen, Nicholas Courtney is trapped in a Lexus with an Auton chauffeur...