Hollywood Wants Internet Providers to Block Copyrighted Files

This year there has been a lot of discussion in Washington about whether Internet service providers should monitor customers’ surfing to target advertising.

Now, there are signs that one topic next year will be whether I.S.P.’s should analyze traffic to block trading of copyrighted files. At least, Hollywood appears to be preparing for that debate. And it is trying to get allies among technology companies and artist groups.