And your point is? Are you suggesting that you are now more likely to use any of those techniques? Or that criminals were helpless before TV came along?
None of this stuff is difficult to learn, and that information has always been readily available to anyone who wanted to be a criminal. Sure it’s easier to find now, but so is information about anything else.
The question is not whether we’ve done some things that help empower criminals, but whether or not we’d be better off in general if we gave the government the power to prevent that kind of publishing.
The first thing I’d note is that in the age of the internet there can be no censorship of information. You can prosecute everyone in the U.S. who published pipe bomb info, but what are you going to do about the web site in Trinidad that publishes the same stuff?
The same will eventually happen with movies - technology is going to render the government obsolete at some point. The cost of movie making is going down, and access to it is going up. Tough noogies for the government nanny-state defenders.
Anyway, there is still absolutely no evidence that exposure to violence makes one more violent, or that exposure to porn makes one more likely to rape. In fact, it may be the opposite - these things may be cathartic releases for people who would otherwise have to act on their impulses.