A new survey says 73% of people have seen harassment take place online
Four out of 10 respondents said they have been harassed themselves
Women, particularly young women, reported severe abuse more frequently
Social media was the most common site of harassment, survey says
(CNN) -- For the past 25 years, the Web has opened up unprecedented possibilities for human communication. But it has a dark side too -- sometimes, a very dark one.
Four out of 10 of Web users have been harassed onlin
