User blog:Icecream18/Wiki question

There's this wiki I go on. It is an inactive wiki, and when it was active, there were no admins. (except the founder) And if it got popular, there would be nobody to promote admins, so if the wiki was badly vandalized and there were no admins, who would block them?

Another question, how do you edit the main page if it is protected? I noticed a grammar mistake and would like to fix it.