We promote freedom of speech and expression precisely so that we can openly disagree about what our culture should be and should value. We vote by admitting certain works to our memory and insisting that our friends also read, listen to, or look at it. Works that are beloved by many have a proportionate effect on the culture; works that are loved by fewer, but with greater intensity, may have an equal or greater effect. It is impossible to measure.
A work may indeed be dangerous, but the counter is not often to censor it, it is to offer an alternative. Yet puritans of one stripe or another invariably insist on censorship. Just as the Puritans of Political Correctness ban any speech by their opponents on most American university campuses merely because they do not agree with them, so also the Puritans of anti-violence would ban videogames merely because they do not enjoy them.
In fact we have actual data about the effects of videogames; even the most harmful are relatively harmless, in terms of any direct cause and effect on real-world violence. Pornography, on the other hand, has been proven to be a rehearsal for real-world acting-out of the scripts thus depicted. Yet the very people who would ban videogames are often the ones most insistent on protecting the freedom of pornographers. Research makes no difference to them; actual facts rarely influence people’s visceral decisions.
My problem is that I understand the arguments for and against censorship. There are things that I believe damage society — pornography among them — but I’m not absolutely sure that I’m right, or that a ban, if once instituted, would be limited to what I would call “pornography.” Once we admit censorship, the definition of the thing censored will always be expanded to include unintended objects.