Earlier quoted context omitted.
Or ones that make you confirm an e-mail address by entering it twice. The reason you confirm a password is because you can't see the password, and so you never know if you mistyped it. Confirming an e-mail address, in a normal text field, is just stupid busywork.
It is a protection against typos, because people are lazy and error-prone and it matters because getting it wrong means email delivery fails, whereas a misspelled name is no big deal. So, elegantly, two different issues use the same simple solution.
The better solution is to send an e-mail with a confirmation link upon signup. This also protects against deliberately falsified e-mails, and against typing it incorrectly twice, and against folks who automatically copy & paste when they see "Confirm your..." And it's only a tab switch and click rather than having to key in a few dozen characters, which matters even more in the brave new mobile/tablet world.