Just to make things more complicated, I've been assuming that worlds where the Internet exists have their own Internets that are separate, and those characters can only see DDD!Wikipedia and such if someone from a different world posts a link.

For instance, Karen's Internet is a year behind most of the community, and also has no references anywhere to Pretty Cure. But when other people give her links, she can see pages that don't exist yet for her, and pages that will never exist at all in her world.