There is no karma requirement for those pages (karma on the main site isn’t integrated into the wiki, and the wiki code doesn’t know what your LW karma is).
We think that it’s not very obvious that the front page is under wiki control. If we start to get spam on those pages it’s easy to “Protect” them, which will make them behave as you expected them to behave (only special wiki users can edit them).
There is no karma requirement for those pages (karma on the main site isn’t integrated into the wiki, and the wiki code doesn’t know what your LW karma is).
We think that it’s not very obvious that the front page is under wiki control. If we start to get spam on those pages it’s easy to “Protect” them, which will make them behave as you expected them to behave (only special wiki users can edit them).