Sherlock had the whiff of a Trolltown alter ego about him, I now believe they are probably the same person after TT turns up on this thread days later to further hurl the insults.
He only swears on his Sherlock account though. Good cover.
No one is saying that you're going to immediately go out and shoot someone.
But what it does is desensitise society to violence and makes it more acceptable consciously and sub-consciously. Which in the wrong people and in the long run leads to more violence committed.