Blood, Violence and Gore- Oh My!

I'm not a fan of screen violence- but when its necessary I can appreciate it. For instance:

(skip to 5:58): http://www.youtube.com/watch?v=TyR-su0cELY

Not a scene I like to watch at all but I understand why its been made so realistically- because the truth is that sort of thing (unfortunately) happens in this lovely world of ours. Sylvester Stallone didnt want to 'tone down' or 'hollywood-ise' Rambo 4 because he didn't want the audience to grow naive over what really happens in third world places like Burma- an understandable move- but a wise one?

Depending on who you are, screen violence could be good or bad- of late, screen violence has been frowned upon especially for games because they are seen as a bad influence on the younger generation- blowing things up in Call of Duty may be fun, but as we know, in real life its a whole different story- which is what a select minority fail to see.

Some of us, i.e. those who are born strong-willed, without mental illness and aren't abused at a young age will learn to appreciate screen violence but not necessarily like it- unfortunately the others I mentioned in the fore are sometimes influenced by it too much. For instance, the famous case of James Bulger who was murdered in 1993- his killers were both young boys who'd been apparently influenced by the film 'Child's Play 3' and subsequently murdered James to 'mimic' what they'd seen in the film. The film obviously cannot be blamed entirely, but when it comes to people who are (clearly) already ill-minded, it only takes one nudge to push them over the edge.

So should on-screen violence be banned? Its not all about how well its done either- I remember Bill telling us about that guy who went on a rampage after playing Doom- and Doom is hardly realistic. The effect of screen violence is psychological; what we perceive will either horrify us, influence us, or maybe have no effect on us at all. Cases where people are influenced by screen violence are quite rare- but how do we know who to ban and who not to? We don't, of course- the nicest person you see across the street every day could turn out to be a prolific killer. Not even certificates on games or films work- yes, children arent allowed to buy them but they can watch/play them through other means. The question we have to ask is; is the sane people's entertainment really worth the influence of killers?