There is a Wikidot user called NoRaNetaN who was hacked by Googol (or maybe sbgoogol01? No specification…) to vandalize fundamental Wikidot sites.
[[div style="position: fixed; z-index: 999; top: 0; left: 0; width: 100%; height: 100%; background: black; display: flex;color: white; align-items: center; justify-content: center; font-family: "Noto Sans SC", serif; font-size: 300%; font-weight: 900"]]
[[=image https://paradox-sandbox.wikidot.com/local--files/files/SCP-Bomb_Departments-Pataphysics.png style="width:400px;filter:brightness(100%)"]]
[[/div]]
[[include :backroomssandboxcn:cambrian-white-2
|display=杀死我们的神
|color=000000
|list-color=000000
|image-size=9223372036854775807%
|one=杀死我们的神
]]
What does this code do? It blocks everything on the page and keeps users from using the site, and from removing it. Why is that bad? Well, most of these sites are part of the Iron Giant project, so when users make a site using one of those templates… well… they just get a fixed image that won't go away. The text in the image is basically hacked NoRaNetaN/Googol saying how easy these sites were to mess up and calling the owner of the site a euphemism.
If you check the source of NoRaNetaN's recent edit (they made this while they were hacked) to the site http://bugs-template.wikidot.com/, you can see that it was in fact them (while hacked) who messed up these sites. You can check the Iron Giant website to see what templates they have "infected".