Actually, on further thought, in the scenario where you want students to create web content to interact with the public, but still keep their real names secret, the proper thing to do would be set the "Users can hide real names" setting, and have each student tick the option to hide their real name, and give themselves a display name unrelated to their real name. Or assign them one.
(You have to rely on active student cooperation anyway, if you want them to author content and retain their anonymity, because they could for instance create a text block that says, "Hi, my name is Aaron Wells!")
So I'm still not seeing a strong need for pages with no author line.
Actually, on further thought, in the scenario where you want students to create web content to interact with the public, but still keep their real names secret, the proper thing to do would be set the "Users can hide real names" setting, and have each student tick the option to hide their real name, and give themselves a display name unrelated to their real name. Or assign them one.
(You have to rely on active student cooperation anyway, if you want them to author content and retain their anonymity, because they could for instance create a text block that says, "Hi, my name is Aaron Wells!")
So I'm still not seeing a strong need for pages with no author line.