Plato Would Condemn Soaps
I've talked at length before about Plato and censorship (e.g.: one, two, three). The aim is not to settle questions about freedom and limits of speech but to show that the measures spelled out in the Republic are not completely crazy and, in fact, are reflected in a number of contemporary concerns.
Myles Burnyeat's Tanner Lectures are, I think, really great at showing how Plato's concern is the pervasive effect that society's mass art has on its culture. You have to remember that banning or censoring Homer would not just be like applying such treatment to Shakespeare - Homer was a staple of education, but also part of mainstream culture and entertainment. Burnyeat interprets the allegory of the Cave as a statement about how most people are not only detached from higher reality (the Forms), but enthralled by the shadows and images of poets.
If he was alive today, Plato's concerns would no doubt extend to TV. Bupa has recently condemned soaps that portray characters living unhealthy lifestyles - drinking, smoking, poor diet and lack of exercise - without suffering the likely health consequences. This is a very similar concern to Plato's: he criticizes stories that, essentially, show that cheats prosper, rather than portraying the real effects of injustice - which he likens to an illness of the soul. In both cases, the worry is that members of the public will be led into bad habits by popular media that portray the benefits of vice without the cost.
(I am not, of course, suggesting that Bupa want to censor soaps; merely that they share a similar concern. They suggest that scriptwriters should include stories emphasizing the harms of unhealthy lifestyle; Plato prefers to excise cases where the unjust profit - the result is much the same).