There aren't a lot of people claiming textbooks are infallible.

As if My Little Pony: Friendship Is Magic needed enhancement.

Do you want ants? Because that's how you get ants!

Actually, there WAS a great hue and cry when GMail was introduced with the feature. It wasn't that long ago, people. Even though you're on the internet, try to actually think back past your last Facebook posting.

If Google allows you to search for The Hurt Locker torrents, okay, it's being a dumb service and performing its standard operating according to your explicit parameters. If it auto-completes The Hu with The Hurt Locker Full DVD Rip Torrent, well, now it's gone from performing its standard operation at your request to actively suggesting things you *might* look for. Allowing you to search for infringing content is safe, but there could be liability, or at least litigation, when the service starts making suggestions.

Actually, if you're going to stick with cars, it's like a safety and emissions check in realtime. If your car is spewing excessive pollution or presents a hazard to other drivers (critical safety features like turn signals, head lights, tire treads, etc., missing or malfunctioning) they don't let you go around being a hazard on public roads. It makes sense for ISPs, in a uniquely capable position to detect it, to disconnect systems that are spewing malware and presenting a hazard to other computers on the network.