Back with a bang, Monkeytrousers!
I think TV violence is an issue, actually, because TV is such an influential medium and we still don't know exactly what effect it has on us.
I was watching Coronation Street recently (how sad am I, all my social observations are based on Corrie) and it was high comedy, Cilla and Les's wedding. Cilla threw a brick through Tracey Barlow's window in order to get flowers for free.
Now in the real world, Tracey would have called the police. In Soap world, there are no consequences for such extreme behaviour - it is just presented as comedy. And unfortunately, there is a large number of people who really are quite stupid and get all their information about life from TV, tabloids, cheap celebrity gossip magazines, and what their equally uninformed friends tell them, and they aren't able to distinguish between fiction and reality. And I think those people (along with the very young who are not being guided) are quite vulnerable to the confusing messages a lot of TV programmes send out. (Which is why I get pedantically annoyed when soaps have storylines which ignore reality, but that's another thread!)
And I do think that TV series which show very bad behaviour going completely unnoticed, is quite insidious. I don't mean that all programmes ought to have an Enid Blyton righteous ending, where the goodies triumph and the baddies get their come-uppance (because in RL lots of baddies win all the time) but just that bad behaviour at least ought to be commented upon, so that viewers are not left with the impression that very bad behaviour is the norm.