I have two main comments on this paragraph.
First, I would say that it is a little bit hard to justify saying that Sideshow Bob suffers no negative consequences from his violence towards Bart. First of all, he is in prison even if he does get paroled. Second of all, he gets caught by the police again at the end of the show and we assume he is going back to prison. This hardly seems to send the message that there are no consequences to violence.
Second, I think that you should explain the ways in which this show causes the two effects better. The victim effect is fairly obvious, though you could still give a brief sentence making clear how this show causes young people to feel that way. But it is harder to see how the bystander effect applies here. I would suggest that you clearly state how and why this episode would, in your mind, bring about a bystander effect.