system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Why is Wikipedia not a complete mess? If anyone can edit it why isn't it overrun by vandals?

There are hundreds of thousands of articles. How are they all monitored?
gpt
There are bots that will autorevert more obvious vandalism, and articles which have a lot of vandalism are protected. For instance, while you can edit most articles without an account, if you try to edit the pages for Obama or Jesus you'll need to login and any vandalism will result in a ban. They can ban accounts and IP addresses.