It's actually just images from the show and people pause at a moment in an episode to get these faces or some people have too much time on there hands and do really well with Photoshop.
SHAGGY DIED OF AN OVERDOSE, FREDDY FROM HIV; DAPHNE GOT KNOCKED-UP AND IS ON WELFARE; WE ALL KNEW VELMA WOULD BE THE ONE TO STICK IT OUT THROUGH THE DARK DAYS
