Thanks Dread for the reply. I don't see an option there to remove the account.
I'll contact one of the four administrators for this. Hopefully I'll guess the right one immediately, otherwise there are a lot of loops to go through.
You can sort of customise this by watching or ignoring a category.
For example, I am ignoring the Testing Ground category here.
Would it make more sense to have all categories unwatched by default, as opposed to watched?
I actually saw the "Ignore" icon before, but didn't realize what it did. I thought it was something about ignoring users -- so I ignored it